RECENT BOOKS AND PAMPHLETS. Administrative Reports of the Iowa Geol. Survey, Vol. IV, 1894. From the Survey.. ALLEN, J. A.-On a Collection of Mammals from Arizona and Mexico made by Mr. W. W. Price, with Field Notes by the Collector. Extr. Bull. Am. Mus. Nat. Hist., Vol. VII, 1895. From the author. Announcement of the Completion of Funk and Wagnall's Standard Dictionary of the English Language. From the Pub. BEECHER, C. E.-Structure and Appendages of Trinucleus. Extr. Am. Journ. Sci., Vol. XLIX, 1895. From the author. BOAZ, F.-Chinook Texts. Pub. by the Bureau of Ethnology. Washington, 1894. From the Smithsonian Institution. BOULE, M.-Sur des Débris d'Arthropleura. Extr. Industrie Minérale (3) VII, 1893. From the author. BROOKS, W. K.-In Inherent Error in the views of Galton and Weismann on Variation. Extr. Science, 1895. From the author. BROOM, R.-On the Significance of the Proliferated Epithelium in the Foetal Mammalian Jaw. Extr. Ann. Mag. Nat. Hist. (6) XV, 1895. From the author. BRYSON, J.-The Ups and Downs of Long Island. Extr. Am. Geol., 1895. Bulletin No. 31, 1895, Agric. Exper. Station Rhode Island College Agric. and Mechanic Arts. Bulletin of the U. S. Fish Commission Vol. XIII, for 1893. Washington, 1894. From the Fish Commission. Bulletin No. 27, 1895, Iowa Agric. College Experiment Station. Bulletin No. 110, 1894, North Car. Agric. Exper. Station. COVILLE, F. V.-Directions for collecting Specimens and Information illustrating the Aboriginal uses of Plants. Part J of Bull. U. S. Natl. Mus., No. 39. Washington, 1895. From the Smithsonian Institution. Cox, E. S.-The Albion Phosphate District. -Geological Sketches of Florida. From the author. Extr. Trans. Min. Engineers, 1895. EASTMAN, C. R.-Beiträge zur Kenntuis der Gattung Oxyrhina mit besenderer Berücksichtigung von Oxyrhina mantelli Agassiz. Aus Palaeontographica, XLI Bd. Stuttgart, 1894. From the author. EISEN, G.-Memoirs of the California Acad. Sci., Vol. II, No. 4, 1895. Pacific Coast Oligochaeta. From the author. Final Report of the Geology of Minnesota, Vol. III, Pt. I, Paleontology. From N. H. Winchell, State Geologist. FOWKE, G.-Archaeological Investigations in the James and Potomac Valleys. Pub. by the Bureau of Ethnology. Washington, 1894. From the Smithsonian Institution. GILBERT, G. K.-Notes on the Gravity Determinations reported by Mr. G. R. Putnam. Extr. Philos. Soc., Washington Bull., Vol. XIII, 1895. From the author. GILBERT, C. K. AND F. P. GULLIVER.-Tepee Buttes. Amer., Vol. 6, 1895. From the Soc. Extr. Bull. Geol. Soc. HAECKEL, E.-Confessions of Faith of a Man of Science. Translated by Mr. J. Gilchrist. London, 1894. From the author. HALL, C. W. AND F. W. SARDESON.—The Magnesian Series of the Northwestern States. Extr. Bull. Geol. Soc. Amer., Vol. 6, 1895. From the Soc. KINGSBURY, B. F.-The Histological Structure of the Enteron of Necturus maculatus. Extr. Proceeds. Amer. Microscop. Soc., 1894. From the author. Laboratory Studies of the Oregon State Agric. College, Vol. I, No, 1. From F. L. Washburn. MASON, O. T.-Migration and Food Quest. A Study in the Peopling of America. MERRILL, G. P.-Directions for collecting Rocks and for the Preparation of Thin Sections. Extr. Bull. U. S. Natl. Mus., No. 39. Washington, 1895. From the Smithsonian Institution. -Stones for Building and Decoration. New York, 1891. MONACO, A. DE.-Sur les premières campagnes scientifiques de la “Princess Alice." Extr. Comptes rendus des séances de l'Acad. Sci. t. CXX, 1895. From the author. Proceedings of the American Association for the Advancement of Sciences for the 43d Meeting, 1894. Report of the American Humane Association on Vivisection and Dissection in Schools. Chicago, 1895. From the Assoc. Report of the Commissioner of Education for 1891-92, Vols 1 and 2. RIES, H.-On a Granite Diorite from Harrison, Westchester Co., New York. Extr. Trans. N. Y. Acad. Sci., Vol. XIV, 1895. From the author. SALOMON, W.-Geologische und paleontologische Studien über die Marmolata (mit Ausschluss der Gastropoden). Paleontographica, Zweiundvierstiger Bd. Erste bis dritte Lief. Stuttgart, 1895. SCHWATT, I. J.-A Geometrical Treatment of Curves which are Isogonal conjugate to a straight line with respect to a triangle, Pt. I. Boston, New York and Chicago, 1895. From the author. SEELEY, H. G.-Note on the Skeleton of Pariasaurus bainii. Extr. Geol. Mag., London, Dec. IV, Vol. II, 1895.---The Thecodontosaurus and Paleosaurus. -On the type of the Genus Massospondylus, and on some Vertebrae and Limb bones of M. (?) brownii. Extrs. Ann. Mag. Nat. Hist. (6) XV, 1895.On Hortalotarsus skirtopodus, a new Saurischian Fossil from Barkly East, Cape Colony. SEELIGER, H.-Ueber allgemeine Probleme der Mechanik des Himmels. Rede gehalten in der öffentlichen Sitzung der k. b. Akad. der Wiss. zu München, Mär 31, 1892. From the author. SHUFELDT, R. W.-Lectures on Biology delivered before the Roman Catholic University of America, 1892. From the author. STEFANESCU, G.-L'Age du Conglomerate de Sacel, Jud. Gorjiu. Extr. Bull. Soc. Geol. de France (3), t. XXII, 1894. From the author. TASSIN, W.-Directions for Collecting Minerals. Pt. II. Bull. U. S. Natl. Mus., No. 39. Washington, 1895. From the Smithsonian Institution. VETH, P. J.-Overgedrut uit den Feestbundel van Taal-, Letter-, Gescheid-, en Aardrijkskundige Bijdragen ter gelegenheid van zijn Tachtigsten Geboortedag. WEIDMAN, S.-On the Quartz Keratophyre and Associated Rocks of the North Range of the Baraboo Bluffs. Extr. Bull. Univ. Wisc., Science Series, Vol. I, No. 2, 1895. From the Editors of the Bulletin. WHITE, D.-The Pottsville Series along New River, West Virginia. Extr. Bull. Geol. Soc. Am., Vol. 6, 1895. From the author. Ad WILLIAMS, T.-The Church's Duty in the Matter of Secular Activities. dress delivered berfore the Church Congress, Boston, Mass. No date given. From the author. WILLISTON, S. W.-Semi-Arid Kansas. Extr. Kansas Univ. Quart., April, 1895. From the author. WOODWARD, A. S.-Note on a Tooth of Oxyrhina from the Red Crag of Suffolk. Extr. Geol. Mag., Dec., IV, Vol. I, 1894. From the author. WOOLMAN, L.--Artesian Wells and Water Horizons in Southern New Jersey. Extr. Ann. Rept. New Jersey State Geologist for 1893. the author. Trenton, 1894. From age. General Notes. PETROGRAPHY.' Igneous Rocks of St. John, N. B.-W. N. Mathew has continued his work on the igneous rocks of St. John, N. B.,' contributing in a recent article an account of the effusive and dyke rocks of the region. All the rocks described are believed to be pre-Cambrian in They embrace quartz-porphyries, felsites, porphyries, diabases and feldspar-porphyrites among the effusive rocks, and dierite-porphyrites, diabases and augite-porphyrites among the dyke forms. In some of the quartz-porphyries perlitic cracks may still be recognized, and in the felsite porphyries some spherulites. Tuffs of all the effusives are abundant. A soda granite with augite and green hornblende and probably a little glaucophane was also met with. It is intrusive, and has a composition represented by the figures: Sio, Tio, Al,O, Fe,O, FeO MnO CaO MgO Na2O K,O CO, Loss 64.86 .70 15.02 5.53 1.01 .18 2.61 1.42 3.92 2.37 .55 1.73 'Edited by Dr. W. S. Bayley, Colby University, Waterville, Me. 'Trans. N. Y. Acad. Science, XIV, p. 187. The diorite-porphyrite has a groundmass of idiomorphic hornblende, lathshaped feldspars and some interstitial quartz, with phenocrysts of the same minerals, but principally of feldspar. Among the diabases is a quartzose variety. Eruptive Rocks from Montana.-Among some specimens of eruptive rocks obtained from Gallatin, Jefferson and Madison Counties, Montana, Merrill' finds basalts, andesites, lamprophyres, syenites, porphyrites, wehrlites, harzburgites and websterites, some of which possess peculiar characteristics. A hornblende andesite, for instance, contains large corroded brick red pleochroic apatite crystals, whose color is due to innumerable inclusions scattered through them. The groundmass of some of the basalts has a spherulitic structure. is a holocrystalline aggregate of pale green diallage, reddish brown biotite, colorless olivine and a few patches of plagioclase. Its structure is cataclastic or granulitic, the larger crystals being surrounded by an aggregate of smaller ones. The websterite consists of green diallage The wehrlite and colorless enstatite with included foliae of mica and occasional interstitial areas of feldspar, and is thus related to gabbro. Some of the lamprophyres are composed of groups of polysomatic olivines or of olivine and augite in a scaly granular groundmass of lighter colored minerals, through which are scattered small flakes of brown biotite and tiny augite microlites. This structure is accounted for on the supposition that the granular groups of olivine and of olivine and augite belong to an older series of crystalline products than those of the ground mass. -- Porphyrites and the Porphyritic Structure. In a general account of the laccolitic mountains of Colorado, Utah and Arizona, Cross' gives a brief synopsis of the characteristics of the rocks that constitute their cores. These rocks comprise augite, hornblende and hornblende mica-porphyrites, diorites and quartz-porphyrites. All contain phenocrysts of plagioclase and of the iron bearing silicates, with the feldspars largely predominating. These upon separating left for consolidation into the groundmass a magma which upon crystallization yielded a granular aggregate consisting largely of quartz and orthoclase. No pressure effects were seen in any of the sections studied. All are porphyritic with a granular groundmass, which differs in the different rocks, principally in the proportion of its constituents. The porphyritic structure as defined by the author is not the result of the recur Proc. U. S. Nat. Museum, XVII, p. 637. 14th Ann. Rep. U. S. Geol. Survey. rence of crystallization, producing several generations of crystals, but it is a structure exhibiting contrasts in the size and form of the component crystals of a rock, resulting from the differences in conditions under which the different minerals crystallized. Granophyre of Carrock Fell, England. In the Carrock Fell district is a red granophyre closely associated with the gabbros. This rock has recently been studied by Harker, who had previously investigated the gabbros. The normal type of the grano phyre is an augitic variety in which the augite occurs as a deep green species which is idiomorphic toward the feldspars. Oligoclase is also present as idiomorphic crystals in a reddish quartz-feldspar groundmass with the typical granophyric structure. The composition of the rocks is represented as follows: SiO, Al,O, Fe,O, MgO CaO Na,O K,O Loss Total 71.60 13.60 2.40 .21 2.30 5.55 3.53 .70=99.89 As the rock approaches the gabbro it becomes less acid and the pro⚫ portion of augite in it increases. This is the lower portion of the mass as it was originally intruded. Its more basic nature as compared with the rest of the rock is explained as due to the absorption of parts of the gabbro with which the granophyre is in contact. The same author also records the existence of a greisen, which is a phase of the well known Skiddau granite. The greisen consists essentially of quartz and muscovite, but remnants of orthoclose are still to be detected in it. The mica is regarded as having been derived largely from the feldspar. Sheet and Neck Basalts in the Lausitz.-The basalts of the neighborhood of Seifeirnersdorf and Warnsdorf in the Lausitz, Saxony, occurs in sheets according to Hazard,' and in volcanic rocks. The sheet rocks are nepheline basalts, nepheline basanites and feldspathic glass basalts. The neck forms are hornblende basalts, sometimes with and sometimes without nepheline. The constituents of all are magnetite, apatite, augite, biotite, nepheline and glass in varying quantities, with feldspar, olivine and hornblende in different phases. Sometimes the mineral nepheline is absent, but this happens mainly in the glassy varieties, where its components are to be found in the glassy base. There are intermediate varieties between the hornblende and the oli Quart. Journ. Geol. Soc., 1895, p. 125. Ibid, p. 139. 'Min. u. Petrog. Mitth., XIV, p. 297. |