8i8 CRETACEOUS PALEONTOLOGY. 



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 volu- 

 tion 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 

 strongly modifies the form of the aperture and gives it a strongly 

 reniform character; septa distant and very deeply concave, the 

 sutures very nearly at right angles to the axis on the main por- 

 tion of the volution, but forming a very slight backward sinus on 

 the middle of the back, and also slightly bent backward within 

 the umbilical depression as seen on the casts ; siphon subcentral, a 

 little nearer to the ventral than tO' the dorsal margin. Surface 

 of the shell marked by fine transverse lines of growth which are 

 arched strongly backward in crossing the middle of the shell, and 

 forward on the sides." (Whitfield.) 



Formation and locality. — Navesink marl, Atlantic Highlands 

 (io8), Mullica Hill (169) ; Red Bank sand, Shrewsbury River 

 (119). 



Geographic distribution. — New Jersey, Delaware, Alabama, 

 Mississippi, Tennessee, Arkansas, Texas, Nebraska, Montana, 

 Canada. 



Nautilus bryani Gabb. 

 Plate CI., Figs. 1-2. 



1876. Nautilus Bryani Gabb, Proc. Acad. Nat. Sci. Phil., 1876, 



p. 277. 

 1892. Nautilus Bryani Whitf., Pal. N. J., vol. 2 (Monog. U. 



S. G. S'., vol. 18), p. 244, pi. 38, figs. 5-6. 

 1905. Nautiliis bryani Johns., Proc. Acad. Nat. Sci. Phil. 1905, 



p. 28. 



Description. — "Shell large and strong, somewhat compressed 

 on the sides; giving a section to the volution, from the margin 

 of the umbilicus to the dorsum, greater than the width from side 



