OF THE UNITED STATES. 33 
NAUTILUS. 
1. N. Dehayi, (S. G. M.) pl. vii. fig. 4, and pl. xiii, 
fig. 4. 
Speeific character.—Shell very ventricose, with numerous 
undulated, transverse strie ; aperture laterally and profoundly 
expanded. 
From the marls of Monmouth and Burlington counties, 
New Jersey. This is the.only species hitherto found in 
our marls. It has been sometimes compared to N. ez- 
pansus, (Sowerby,) but is much larger: it has also been 
confounded with the British N. imperialis, to which, 
however, it bears no other resemblance than all the spe- 
cies of this genus bear to each other. I have much plea- 
sure in dedicating this fossil to my friend Dr. Dekay, one 
of the most zealous and intelligent of American natu- 
ralists. | | 
Mr. Read has found fragments near Long-branch, 
N.J., which when entire could have been little short of 
eight inches in diameter. The casts so abundant at Prairie 
Bluff, Alabama, (pl. xiii. fig. 4,) are rounder and less 
expanded at the mouth, than those from New Jersey, and 
may possibly be distinct ; if so, I propose for it the name 
of N. perlatus. 
2. N. Alabamensis, (S.G.M.) PI. 18, fig. 3. 
Specific character.—Shell suboval, compressed ; septe pro- 
foundly sinuous; siphuncle very large. Length 10 inches; 
height 9 inches; greatest diameter 44 inches. 
From the newer cretaceous rock, near Claiborne, Ala- 
bama. 
iy 
