MIOCENE MOLLUSCA AND CRUSTACEA. 129 
TURRITELLA CUMBERLANDIA. 
Plate xx111, figs. 9-11. 
Turritella Cumberlandia Conrad; Proc. Acad. Nat. Sci. Phila., 1862, p. 584; Cat. Mioce. 
Foss.; ibid, p. 567; Meek, Check List Miocene Foss., p. 16. 
Mr. Conrad describes this species as follows: ‘Elongate, tapering grad- 
ually; volutions twenty-four, bicarinated, carina nearly equal, distant; 
revolving lines unequal, wrinkled; sides of whorls concave between the 
carinee, somewhat channelled beneath the lower one and rounded at the 
base. Length, 23.” 
This species differs from either of the others herein described in hav- 
ing a comparatively rounded volution in the larger part of the shell and 
in having the carinze almost or quite equidistant from the sutures, with the 
space between them of nearly the same distance as that above or below 
the carine. The shell is proportionally slender, and on the upper part the 
carinze are prominent and the sutures only slightly marked, while on the 
larger parts the sutures are deeply sunken, which gives a rounded volution. 
The revolving lines are usually quite obscure and are often obsolete, though 
sometimes well marked, irregular in size, and numerous. The transverse 
lines, when well marked, are seen to form a strong retral sinus in crossing 
the middle of the volutions. Aperture round. The shells are always 
imperfect in collections, but when a larger and a smaller one are fitted 
together, as in the long specimen figured, a specimen measuring two inches 
and an eighth in length possesses twenty-one volutions. 
Locality: All the examples which I have seen appear to have come 
from Shiloh, N. J. Mr. Conrad’s examples were from the same _ place. 
Collections at Rutgers College and the National Museum. 
TURRITELLA SECTA. 
Plate xxi, figs. 15-17. 
Turritella secta Conrad: Proc. Acad. Nat. Sei. Phila., vol. 7, 1855, p. 268; Cat. 
Miocene Foss. Atlantic Slope, Proc. Acad. Nat. Sei., 1862, p. 568; Meek, Cheek 
List Miocene Foss., p. 16. 
Mr. Conrad describes this species as follows: ‘“Turreted; volutions flat- 
tened or piano-conyex at the sides, with minute obsolete revolving lines, a 
MON XXIV 9 
