HILGARD, E. W.-Continued. Mentions besides Zeuglodon several species from the Vicksburg group, to wit: Orbitoides, Pecten poulsoni, and Ostrea ricksburgensis. Hilgard says: "In fact, the only locality in Louisiana known to me as distinctly of Jackson age is that already mentioned as the source of the Zeuglodon bones, described by Dr. Harlan, about halfway between Columbia and Monroe, on the Washita." Harlan almost certainly did not mean this locality. Supplementary and final report of a geological reconnoissance of the State of Louisiana. On page 29 Rostellaria relata is mentioned from Sabinetown, Tex. From this fossil and subsequent collections Hilgard referred these beds to the Jackson group. On page 33 he mentions that about 7 miles west from Little River Ferry we find outcrops of whitish, heavy, concretionary clay marl, with Orbitoides mantelli, Pecten poulsoni, and Ostrea ricksburgensis. Old Tertiary of the Southwest. Am. Jour. Arts and Sci., Vol. XXX (new series), p. 269, 1885. Refers to Orbitoides, Arca mississippiensis, and Pecten poulsoni, from Bayou Funne Louis. HOPKINS, Dr. F. V. First annual report of the geological survey of Louisiana. In La. State Univ. report for 1869, 1870. A good many names of species of fossils of undoubted Jackson age are given. The Zeuglodon is mentioned from Grand View (on the Ouachita River), Montgomery (on the Red River), and at a point where the Harrisonburg and Columbia roads cross the Catahoula and Caldwell parish line. On page 47 a list of fossils from Montgomery is given. On page 51 some Vicksburg species are listed. Second annual report of the geological survey of Louisiana. In La. State Univ. report for 1870, 1871. On page 11 is found a "List of fossils found in Jackson strata of Louisiana (determined by Prof. E. W. Hilgard, of Mississippi University)." On page 17 is found a list of "Fossils of the Vicksburg group in Louisiana (determined by Dr. E. W. Hilgard)." In neither of these lists are localities for the species given. JOHNSON, LAWRENCE C. Report on the iron regions of northern Louisiana and eastern Texas. 50th Congress, 1st session, House of Representatives, Ex. Doc. No. 195, p. 20., 1888. Notes the occurrence in Louisiana of fossils comparable to those of the Middle and Lower Claiborne of Alabama. LERCH, OTTO. A preliminary report upon the hills of Louisiana, Part I, north of the Vicksburg, Shreveport and Pacific Railroad. Bull. of La. State Exper. Stations, 1892. On page 28 gives a list of a few species from near Mount Lebanon, and refers them to the Claiborne. The same, Part II, south of the Vicksburg, Shreveport and Pacific Railroad, 1893. On page 89 he mentions finding Zeuglodon near Tullos Station, in Catahoula Parish. MORTON, Dr. S. G. Synopsis of the organic remains of the Cretaceous group of the United States. Philadelphia, 1834. On page 24, Morton erroneously speaks of Cretaceous (“ferruginous sands") strata between Alexandria and Natchitoches, and relates that Judge Bry “has also noticed near the township of Washita, on the Washita River, where it is recognized as Belemnites, Ammonites, and Gryphæa." OWEN, Prof. RICHARD. Observations on the teeth of the Zeuglodon, Proc. Geol. Soc. Lond., Vol. III, 1839, pp. 24 et seq. Observations on the Basilosaurus of Dr. Harlan (Zeuglodon Read January 9, 1839. Trans. Geol. Soc. Lond., Vol. VI, pp. 69–79, 1842. Observations on certain fossil bones from the collection of the Jour. Acad. Nat. Sci., Phila., Vol. I (2d series), p. 18 et seq, 1847. VAUGHAN, T. WAYLAND. Notes on a collection of mollusks from northwestern Louisiana and Harrison County, Texas. Am. Naturalist, November, 1893. On page 946 mentions Ostrea sellaformis from the northern part of Natchitoches Parish, and refers the strata there exposed to the Claiborne group. Stratigraphy of northwestern Louisiana. Am. Geologist, Vol. XV, pp. 205–229, April, 1895. In this paper several lists of species of fossils from Louisiana are published. LOCALITIES FROM WHICH FOSSILS ARE LISTED IN THIS PAPER. After each of the Lower Claiborne species a list of the localities at which it is found is given, but the descriptions of the localities are abbreviated. Therefore the exact geographic position of each locality is given here. The numbers are the station numbers in the record book of the United States National Museum. LOWER CLAIBORNE LOCALITIES. BOSSIER PARISH. 2041. Near Redland, SW. † of SW. † of sec. 20, T. 23, R. 12 W. 2042. L. P. Saunders's place on sec. 18, T. 22, R. 12 W.; L. C. Johnson collector. 2416. Near Redland, SE. sec. 19, T. 23, R. 12 W.; G. D. Harris collector. WEBSTER PARISH. 2001. On Mount Lebanon road 2 miles east-southeast of Minden, SE. of SE. of sec. 26, T. 19, R. 9 W.; L. C. Johnson collector. NE. sec. 7, T. 17 N., R. 9 W.; Otto Lerch collector. 1 Exact locality sec. 32, T. 14, R. 7 W., in Bienville Parish, almost at the Natchitoches line. CLAIBORNE PARISH. Near Homer; exact locality not given; Otto Lerch collector. 2040. NE. of sec. 10, T. 19, R. 6 W. 2043. Near Pittmans Mill, sec. 16, T. 19, R. 7 W. 2038. Pittmans Mill, SW. of SE. sec. 19, T. 19, R. 7 W.; L. C. Johnson collector. LINCOLN PARISH. 2008. Exact locality (?) L. C. Johnson collector. BIENVILLE PARISH. The largest single collection was that made by myself during a residence of several years at Mount Lebanon. There are several wells in the vicinity of the town, in the dumps from which I obtained many fossils. One known as Tooke's well is situated in the eastern outskirts of the town; another, known as Roland's well, is 1 mile north, on the road to Gibbsland. Casts of fossils are found in the brownish ferruginous sandstone which abounds in that neighborhood. The best collecting ground is on Hammetts Branch, SW. sec. 30, T. 18 N., R. 6 W., about 2 miles northeast of Mount Lebanon. The fauna found in these localities is identical. At first I kept all of the specimens carefully separated under their respective locality labels, but later I placed nearly all of them under the general label Mount Lebanon. All of the species from the vicinity of Mount Lebanon, except two or three, were collected at Hammetts Branch. I also made a collection on sec. 32, T. 14, R. 7 W., in the southern part of the parish. Mr. L. C. Johnson collected from the following localities: 2033. Holstun's well, 5 miles southeast of Gibbsland. 2034. Holstun's place, sec. 17, T. 18, R. 5 W. 2035. Hammetts Branch, sec. 30, T. 18, R. 6 W. 2036. Well, sec. 6, T. 16, R. 5 W. 2037. Well at Rayburn's place, sec. 29, T. 17, R. 5 W. 2045. Well No. 1, sec. 17, T. 18, R. 6 W. 2046. Well No. 2, sec. 17, T. 18, R. 6 W. 2047. Well No. 3, sec. 16, T. 17,1 R. 6 W. NATCHITOCHES PARISH. 2006. Natchitoches; L. C. Johnson, collector. Natchitoches; strata 1 and 2.2 One-half mile northwest of Provencal, on Texas and Pacific Railway. I collected a good many poor fossils, mostly casts in argillaceous limestone, Two miles east of Provencal, sec. 26, T.8 N., R. 8 W.; Lerch and Vaughan collectors. WINN PARISH. Couley, sec. 10, T. 10, R. 5 W. Ten miles northwest of Winnfield; Lerch and Vaughan, collectors. St. Maurice, at the mouth of Sabine Bayou; T. W. Vaughan, collector. 2005. St. Maurice, Dr. D. S. Waddell, collector. This probably should be T. 18. 2 Am. Geol., Vol. XV, Pl. IX, fig. 5, p. 229, April, 1895. JACKSON PARISH. Ten miles east of Liberty Hill, on road to Vernon. Fourteen miles east of Liberty Hill, on same road; Lerch and Vaughan, collectors. GRANT PARISH. Georgetown; Lerch and Vaughan, collectors. JACKSON LOCALITIES. GRANT PARISH. 2003. Montgomery; L. C. Johnson, collector. Montgomery; T. W. Vaughan, collector. CATAHOULA PARISH. Tullos-Zeuglodon bones; Lerch and Vaughan, collectors. Two miles north of Rosefield; presented to the Louisiana Geological Survey. DESCRIPTIONS OF NEW SPECIES. PLEUROTOMA LERCHI, sp. nov. Pl. II, fig. 1. Form and size indicated by figure. Whorls, 9; 1 and 2 smooth, 3 and 4 costate; remaining whorls devoid of costa or longitudinal folds. Suture in a depression bordered above and below by a prominent elevated revolving line. The whorls of the spire are concave; the concavity is bordered above and below by a strong revolving line; the upper of these lines is just below the suture, while the lower is just above it. In the medial portion of this depressed region is a beaded revolving line, and sometimes several faint plain revolving lines. The beaded line corresponds in position to the retral sinus. On the body whorl the lower of the above described prominent revolving lines forms a slight carina. Immediately below this carina is a space, in which is a very fine line, bordered below by a rather prominent line. The position of the suture corresponds to this prominent line. Anterior to this line are fine but distinct revolving striæ, usually alternating in size. Lines of growth indistinct. Localities.-Hammetts Branch, near Mount Lebanon (type, Vaughan); St. Maurice (Vaughan). Geological horizon.-Lower Claiborne. Type in United States National Museum. PLEUROTOMA SANCTI-MAURITII, sp. nov. Pl. II, fig. 2. Form and size indicated by figure. Whorls, 11; 1-3 smooth; 4 minutely costate; 5-9 have about 17 rather faint longitudinal folds below the sinus; 10-11, devoid of longitudinal folds, may be subcarinate. Coarse spiral lines may be distinguished on all of the whorls except the embryonic. Lines finer in region of sinus. Below humeral angle revolving striæ alternating in prominence and grouped in systems of five, two coarser on the outside, between which is a median finer one; between the median and each outer stria is another still finer. Lines of growth distinct. Sinus moderately deep, situated in the space between humeral angle and suture. Region of sinus slightly concave. Locality.-St. Maurice (Vaughan, types); 10 miles northwest of Winnfield (Lerchi and Vaughan). Geological occurrence.-Lower Claiborne. Types in United States National Museum. PLEUROTOMA LUDOVICIANA, sp. nov. Pl. II, fig. 3. Size and form indicated by figure. Unfortunately the apex of the specimen is broken off. The figure shows the number of whorls in type. Whorls slightly concave between suture and the shoulder. Suture margined above by a row of nodules, which projects outward beyond the suture. Surface marked by minute revolving striæ. Retral sinus situated on the humeral angle, and corresponds in position to the nodules that margin the suture superiorly. Locality.-Hammetts Branch, near Mount Lebanon (Vaughan). Type in United States National Museum. PLEUROTOMA SHALERI, sp. nov. Pl. II, fig. 4. Size and form indicated by figure. Whorls, 6+. The embryonic whorls are broken off the type. On each of the post-embryonic whorls above the body whorl there are seven gentle longitudinal folds, which decrease in prominence with the increasing age of the shell. On the body whorl the folds have vanished. Suture appressed. Surface coarsely striate spirally. Below the suture is a space, on the body whorl 1 mm. wide, in which there is a single elevated revolving line. Between this space to the suture below there are five coarse striæ; just above the uppermost of these there is a smaller stria. The lowest of the above mentioned striæ borders the suture superiorly. On the back of the rostrum the striæ are finer, crowded, and wavy. Lines of growth rather distinct. Retral sinus situated medially in the whorls of the spire. This species apparently is most nearly related to Pleurotoma vaughani Harris, but is smaller and more robust, and the longitudinal folds are obsolete in the body whorl. Locality.-Ten miles west of Liberty Hill, on the road to Vernon (Lerch and Vaughan). Bull. 142-3 |