GASTEROPODA OF THE LOWER GREEN MARLS. Sid 
fragment of the Tippah County specimen in the Am. Mus. Nat. Hist. no 
such vertical markings are seen. Among the collections from Haddonfield, 
New Jersey, in the collections of the Acad. Nat. Sci., Phila., there is an 
imperfect example of a small individual which I suppose to belong to this 
species, with shell preserved, and in which the rostrum is seen to be about 
equal in length to the rest of the shell, including the aperture, and to have 
been apparently very slightly twisted. 
Formation and locality: Inthe Lower Marls at Upper Freehold and 
Walnford, from the sand under the Lower Marls at Backmans pits, near 
Middleton, and from the clays below the marls at Haddonfield, New Jersey. 
PYROPSIS PERLATA ? 
Plate 1, Figs. 8-10. 
Tudicla (Pyropsis) perlata Conrad ?: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, 
p. 288, Pl. xtv1, Fig. 39; Gabb, Synopsis, p. 85; Meek, Check List Cret. 
and Jur. Foss., p. 23. 
Rapa elevata Gabb, and Pyrula Richardsonii? Tuomey, Conrad: Am, Jour. 
Conch., vol. 4, p. 248. 
Pyropsis Richardsonii (Tuomey) Gabb: Proc. Acad. Nat. Sci., Phila., 1876, p. 284. 
Tudiela (Pyrula) trochiformis Tuomey, Gabb: Synopsis, p. 85, foot note. 
Shell, as shown by internal casts of moderate size, broadly turbinate, 
with a low, almost flat spire, and short rostral beak; volutions about three 
in number, strongly angular on the upper part, nearly flat on the summit 
and rapidly increasing in size with increased growth; sutures very strongly 
marked, the inner whorls having been embedded in the upper part of the 
outer ones; aperture comparatively large, ovate, wide and angular above 
and pointed below. Umbilical cavity of the east very large, indicating a 
very strong and thickened columella and short rostral beak; no evidence of 
spiral ridges or striz is shown on the casts examined. 
Tam by no means certain that this form, as seen in the New Jersey 
beds, is identical with 7. perlata, Conrad; the specimens do not furnish posi- 
tive characters by which the question can be determined. Conrad’s shell, 
as figured, would have left very much such a cast as this one, as far as the 
casts could be preserved, except, perhaps, in the extension of the rostral 
