Report on paleontology . s of the Shark RiverMarls given in Geol. N. J. for 1868, includes Nautilus Burtini Got. and Desh. as occurring in these beds, and places them both underConrads genus Gymomia, which was founded upon the first of these twospecies. It is possible that a species possessing the features of that genusmay occur in New Jersey; but among those which I have seen noneshow the double sinuate septa of N. Burtini as described by Mr. Conrad,therefore I am inclined to doubt their existence in the State. MostEuropean authors agree in considering N. Burtini and N. Lamarcki a
Report on paleontology . s of the Shark RiverMarls given in Geol. N. J. for 1868, includes Nautilus Burtini Got. and Desh. as occurring in these beds, and places them both underConrads genus Gymomia, which was founded upon the first of these twospecies. It is possible that a species possessing the features of that genusmay occur in New Jersey; but among those which I have seen noneshow the double sinuate septa of N. Burtini as described by Mr. Conrad,therefore I am inclined to doubt their existence in the State. MostEuropean authors agree in considering N. Burtini and N. Lamarcki assynonyms, but Deshayes points out differences, and Milne Edwards gives 286 PALEONTOLOGY OF NEW JERSEY. them as distinct. Mr. Meek appears to have not only considered themas distinct, but to have had Mr. Conrads authority for the statement, andfor their occurrence at Shark River. Formation and locality: In the upper layers of the Upper Green Marls,at Shark River, and Squankum, Nevir Jersey. Collection at Rutgers Pig. 2 Naatilns Cookana.—One-halt natural siae. CEPHALOPODA OF THE EOCENE MAELS. 287 Genus ATURIA Bronn. Aturia Vanuxemi. Plate XLix, Figs. 1, 3, and Plate L, Fig. 1. Pelagus Vanuxemi Conrad: Jour. Acad. Nat. Sci., vol. 1, 2d ser., p. 130, PI. xiv, Fig. Vanuxemi Conrad: Am. Jour. Conch., vol. 2, p. ziczac (Sow.) Conrad: Am. Jour. Conch., vol. 1, p. 150; Smithsonian Check List, p. angustatus Con.: Am. Jour. Conch., vol. 1, p. 150; not N. angustatus Conrad, U. S. Expl. Exp. Geology, p. 728, PI. xx. Figs. 5, 6. Shell of moderately large size, the most perfect one which I have seen,but which is an internal cast only, measures 6J inches in its longest diame-ter, and has a thickness from side to side of about 2 inches, but has appar-ently been considerably compressed in this direction. The form is closelyconvolute with a closed umbilicus; sides depressed, convex, and dorsumnarrowly rounded. The inner volution projects into the apert
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