GASTEROPODA FROM BASE OF THE UPPER GREEN MARLS. 187 
been smooth on the exterior surface. It is by far the largest form of this 
group of shells which I have seen from the American formations, the imper- 
fect cast measuring 3$ inches long by 13 in diameter across the body whorl. 
The beak of the shell is entirely absent, only the internal cast of the shell 
being present, but it would indicate a shell of unusual dimensions for this 
group. 
Formation and locality: The cast appears to be from the base of the 
Upper Green Marls, but the specimen is without definite locality. The 
lithological features would indicate it as coming from that position from 
near New Egypt, New Jersey. 
TURRITELLID. 
Genus TURRITELLA Lamarck. 
TURRITELLA PUMILA ?. 
Plate xxu11, Figs. 5, 6. 
Turritella pumila Gabb: Jour. Acad. Nat. Sci., 2d ser., vol. 4, p. 392, Pl. uxvut1, 
Fig. 14; Synopsis, p. 91; Meek, Check List Cret. and Jur. Foss., p. 19. 
Shell, as seen in casts, of medium size, rather rapidly tapering, the 
apical angle being about 30°. Volutions nearly round, the outer surface 
between the sutures being depressed convex to near the lower third, from 
which point they are more rapidly rounded to the suture; the number of 
whorls in a specimen which would, if perfect, measure 14 inches in length, 
have been about seven. Sutures strongly marked, but the whorls in the 
cast are close, indicating a thin shell. Surface, as indicated by the casts, 
marked by several spiral ridges. 
There is much doubt as to the proper identification of this species. 
The rapid increase in diameter of the volutions, and their rounded form, 
together with the numerous spiral ridges, would ally it with the Tennessee 
species, but its much greater size is against it. It is, however, quite distinct 
from any other species found in New Jersey, and equally so from any 
other species found in the Cretaceous deposits of the Atlantic coast. 
Formation and locality: The cast figured is from the collection of the 
Acad. Nat. Sci., Phila., and was found in a tray with others marked “ Vin- 
centown, N. J.” 
