SECTION V. 
CEPHALOPODA OF THE CRETACEOUS MARLS OF NEW JERSEY. 
Class CEPHALOPODA. 
Order TETRABRANCHIATA. 
Family NAUTILID. 
Genus NAUTILUS Breyn. 
NAUTILUS DEKAYI. 
Plate xxxvul, Fig. 1-6; and Plate XXXVI, Figs. 1-4. 
Nautilus Dekayt Morton: Synopsis, p. 33, Pl. vu, Fig. 4, and Pl. xi, Fig. 4; 
Gabb, Synopsis, p. 30; Proc. Acad. Nat. Sci., Phila., 1876, p. 277; Meek, 
Check List, p. 25; Geol. Sur. N. J., 1868, p. 731; Invert. Paleont., vol. 9, 
U. 8. Geol. Surv. Terr., p. 496; Meek & Hayden, Proc. Acad. Nat. Sci., 
Phila., vol. 8, p. 280; Hall & Meek, Mem. Am. Acad. Arts and Sci., Boston, 
vol. 5, new ser., p. 406; Conrad, Jour. Acad, Nat. Sci., Phila., vol. 4, new 
ser., p. 276. 
Shell of medium size, strongly subglobose in general form. In the 
condition of casts, that in which it is usually found in New Jersey, it is 
slightly umbilicate, but in the shell the axis is solid and somewhat extended 
laterally from the body of the volution, so that the posterior margin of the 
aperture is straightened on each side of the involved inner whorl, and as 
seen from the back of the shell presents a strongly auriculate feature, like 
that of a globular Bellerophon. Section of the volution from the umbilicus 
outward more than semicircular, and the umbilical region impressed in the 
shell, or somewhat funnel-formed in the cast; aperture large, transverse, 
nearly twice as wide as long measured from the involved volution, which 
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