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DRIESCH, H. AND T. H. MORGAN.—Zu. Analysis der Ersten Entwickelungsstadien des Ctenophoreneies. Aus Archiv für Entwickelungsmechanik des Organismen, II Bd., 2 Heft. Leipzig, 1895.
DURAND, J. P.-Questions Anthropologiques et Zoologiques. Extr. Bull. Soc. Anthropol., Paris, 1895.-Genèse Naturelle des Formes Animales. Extr. Revue Scientif., 1888. From the author.
Essarts, A.-Aperçu historique sur la doctrine du Polozoism humain. Extr. Journ. des Inventeurs. Paris, 1895. From the author.
Exhibit of the Smithsonian Institution at the Cotton States Exposition, Atlanta, 1895.
FRASER, A.-A Case of Porencephaly. Extr. Journ. Mental Sci., 1894.
- Morphological Papers. Extr. ns. Roy. Acad. Med. in Ireland, Vol. XII, 1895. From the author.
FRAZER, P.-In Memoriam, Edward Yorke Macauley, Rear Admiral U. S. N. Extr. Proceeds. Amer, Philos. Soc., Vol. XXXIV. From the author.
GOODE, G. B.-An Account of the Smithsonian Institntion. Its Origin, History, Objects and Achievements. Washington, 1895.
JANET, C.-Sur Vespa media, V. silvestris et V. saxonica. Extr. Mém. Soc. Acad. de l'Oise T. XVI, 1895.
Sur l'Organe de nettoyage tibio-tarsien de Myrmica rubra L. race levinodis Nyl. Extr. Ann. Soc. Entomol. de France, Vol. LXIII, 1894.
-Sur Vespa germanica et V. vulgaris. Limoges, 1895.
-Observations sur les Frelons. L. C., 1895. From the author.
KEMP, J. F.-Crystalline Limestones, Ophicalcites and associated Schists of the Eastern Adirondacks. Contrib. Geol. Dept. Columbia Coll. No. XXVII, 1895. From the author.
LAHILLE, F.-Contribucion al Estudio des las Volutas Argentinus. Extr. Revista Mus. de la Plata, T. VI, 1895. From the author.
LE CONTE, J.-Critical Periods in the History of the Earth. Extr, Bull. Dept. Geol. Univ. California, Vol. I, 1895.
LEVY, L. E.—The Russian-Jewish Refugees in America. Philadelphia, 1895. From the author.
MERCER, H. C.-Re-exploration of Hartman's Cave, near Stroudsburg, Pennsylvania, 1893. Extr. Proceeds. Phila. Acad. Nat. Sci., 1894. From the author.
MIDDLETON, C. S.-Annual Address. Extr. Trans. Penna. Homeopath. Med. Soc., 1895. From the author.
MITSUKURI, K. AND S. IKEDA.—Notes on a gigantic Cephalopod. Extr. Zool. Mag., Vol. VII, 1895.
MORGAN, T. H.—The Fertilization of non-nucleated Fragments of Echinoderm Eggs. Experimental Studies of the Blastula und Gastrula Stages of Echinus,
Aus Archiv für Entwickelungsmechanik der Organismen, II. Bd. 2 Heft, Leipzig, 1895. From the author.
OLIVER, C. A.-A Short note upon so-called “Hereditary Optic Nerve Atrophy" as a Contribution to the Question of Transmission of Structural Peculiarity. Extr. Proceeds. Amer. Philos. Soc., Vol. XXXII.
Scott, W. B.-Protoptychus hatcherii, a new Rodent from the Uinta Eocene. Extr. Proceeds. Phila. Acad. Nat. Sci., 1895. From the author.
SHIPLEY, S. R.-Gold, Silver and Money. Extr. Amer. Friend, 1895. From the author. Stiles, C. W.-Notes on Parasites 32, 33, 34, 38 and 39. Extr. Veterinary
1895.- -The Anatomy of the large American Fluke, Fasciola magna and a comparison with other species of the genus Fasciola, S. St. with a list of the chief Epizootics of Fascioliasis, and a Bibliography of Fasciola hepatica by Albert Hassall. Extr. Journ. Comp. Med. & Veterinary Arch., 1894–1895. From the author.
WHITE, C. A.-The Bear River Fauna and its Characteristic Fauna. Bull. U. S. Geol. Surv., No. 128. Washington, 1895. From the author.
Wilson, E. B.-An Atlas of the Fertilization and Karyokinesis of the Ovum. New York and London, 1895, Macmillan & Co. From the author.
The Eruptives and Tuffs of Tetschen.-Two interesting articles on the area of crystalline rocks east of Tetschen on the Elbe, have appeared simultaneously. The first, by Hibsch, is a description of the Tetschen’ sheet of the map of the Bohemian Mittlegebirges, and the second by Graber, is on the fragments and bombs occurring in the tephrite tuffs of the region.
The volcanic rocks of the district are interbedded basalts, tuffites, tuffs and tephrites, of which the fragmental rocks are in greatest abundance. Augitites also occur as sheets, and camptonites as dykes in upper Cretaceous marls. The older igneous rocks are granitites and diabases that are associated with clay slates, probably of Cambrian age. Analyses of each of these rocks are given but the rocks are not described in detail. The greater portion of the author's article deals with the volcanic rocks. The tuffs are composed of basaltic and tephritic fragments of the coarseness of sand in some cases, and in others of
· Edited by Dr. W. S. Bayley, Colby University, Waterville, Me.
pieces several feet in diameter. These are cemented together by finer
The basalts and tephrites constitute sheets and lava streams that are
The rocks in all their forms are normal in their development. The author regards contact action around the chimneys as the safest criterion by which to distinguish these forms from denuded sheets and flows. The tephrites comprise hauyn-tephrites, in which hornblende and aegerine are present, nepheline-tephrite, including trachytic and andesitic varieties, and leucite-tephrite composed of phenocrysts of augite, plagioclase and grains of magnetite in a groundmass of these same components, and leucite, biotite and nepheline.
The augite consists of two generations of magnetite and augite in a glassy base. Its analysis gave:
SiO, TiO, P,0, A1,0, FeO, FeO CaO MgO K,0 Na,O H,0 Moisture Total 13.35 1.43 1.54 11.46 11.98 2.26 7.76 11.69.99 3.88 2.41 .59 =99.34
The feldspathic basalt and the andesitic tephrite are the only rocks
Graber's article is devoted principally to a description of the frag-
52°-56° and in the phonolitic type, the most acid variety, it is 50053°. In each of the types labradorite and sometimes oligoclase phenocrysts are common, but the feldspar of the groundmass differs in character in the different types. In the andesitic type it is oligoclase, in the leucite variety andesine, and in the phonolitic type sanidine.
A Nepheline-Syenite Bowlder from Ohio.-Miss Bascom has found in the drift near Columbus, Ohio, a bowlder which consists of nepheline-syenite porphyry. The rock is composed of large phenocrysts of oligoclase and smaller ones of nepheline, augite, hornblende and olivine in a groundmass composed of plagioclase and orthoclase laths, hornblende, biotite, augite and magnetite in a feldspathic matrix.
Crystalline Rocks of New Jersey.-In a report on the Archean Highlands of New Jersey, Westgate states that the northern balf of Jenny Jump Mt., Warren Co., consists mainly of gneisses with a small area of crystalline limestone, diorites, gneisses, etc. The gneisses are granitoid biotite-hornblende varieties, biotite.gneisses and hornblende-pyroxene gneisses. In the first named variety the prevailing feldspars are microcline and microperthite, and in the pyroxene gneisses plagioclase and orthoclase. The gneisses are cut by pegmatite dykes, amphibolites and diabases.
Associated with the white crystalline limestones are fibrolite and biotite gneisses, hornblendic gneiss, amphibolites, gabbros, norites and diorites, most of the latter of which show evidence of an eruptive origin. Another type of rock often found associated with the limestones is a quartz-pyroxene aggregate, in which the pyroxene is a green or white monoclinic augite. The limestone, the fibrolite and biotite gneisses and the quartz-pyroxene rock are thought to be metamorphosed sediments.
Simple Crystalline Rocks from India and Australia.-Judd gives us an account of several simple crystalline rocks from India and Australia. One is a corundum rock composed principally of corundum grains with rutile, picotite, diaspore and fuchsite as accessory constituents. The corundum is in part pale colored and in part strongly pleochroic. The grains of the latter extinguish together producing with the former a micro-poicilitic structure. One of the specimens examined came from South Rewah and the other from the Mysore State.
"Journ. Geol., Vol. IV, p. 160.
5 Ann. Report State Geol. of New Jersey for 1895. Trenton, New Jersey, 1896, p. 21-61.
6 Mineralogical Magazine, Vol. XI, p. 56.
Associated with the corundum in the Mysore State is a fibrolite rock.
The Weathering of Diabase.--Mr. Merrill' describes the changes
SiO, A1,0, Fe,0, FeO Cao MgO MnO K,0 Na, P,0, Ign Total Fresh 47.28 20.22 3.66 8.89 7.09 3.17 .77 2.16 3.94 .68 2.73=100.59 Weathered 44.44 23.19 12.70 6.03 2.82.52 1.75 3,93 .70 3.73= 99.81
The disintegration of the rock is accompanied by a leaching out of its
The paper is full of valuable suggestions that cannot be even referred
Petrographical Notes.--Transitions from massive anorthosites into augen gneisses and into thinly foliated gneisses and transitions from olivine gabbro into hornblende schists are briefly described by Kemps in a preliminary article on the dynamic metamorphism of anorthosites and related rocks in the Adirondacks.
Pirssono suggests the use of the word anhedron to express the meaning usually expressed in the phrase by pidiomorphic form.' An anhedron is a body with the physical constitution and properties of a crystal but without the crystallographic form. The term may be conveniently applied to the crystalline grains in rock masses.
- Bull. Geol. Soc. Amer., Vol. 7, p. 349.