GASTEROPODA OF THE LOWER GREEN MARLS. 39 
This species is somewhat obscure in its generic features. Mr. Gabb’s 
figure is somewhat longer than the specimen from which it was made, the 
spire being rather high and the beak less prolonged. I am not at all sure 
that it is not properly referrable to the genus Perissolax, but it is, perhaps, as 
safe to leave it here as to venture another reference without a more positive 
knowledge of the shell itself, nothing but casts having yet been seen. I 
have only two casts in hand which I have referred to the species, and they 
differ considerably from each other in the proportional gibbosity of the 
body whorl and somewhat in the proportional length of the body of the 
shell. 
Formation and locality: In the Lower Green Marls at Walntord, New 
Jersey, at Mr. C. Bruere’s pits, and the sand under the Lower Marls at Mr, 
Backman’s pits, near Middletown, New Jersey. Mr. Gabb’s specimen came 
from the same horizon at Mullica Hill, New Jersey. 
PyrRopsis RICHARDSONII ? 
Plate 1, Figs. 14-16. 
? Pyrula Richardsonii, Tuomey: Proc. Acad. Nat. Sci., Phila., 1855, p. 169; Con- 
rad, Am. Jour. Conch., vol. 4, p. 248. 
Pyropsis Richardsonii (Tiomey) Gabb: Proc. Acad. Nat. Sci., Phila., 1876, p. 284. 
Perissolazx [?] Richardsonii (Tuomey) Gabb: Gabb, Synopsis, p. 67; Meek, Check 
List Cret. and Jur. Foss., p. 23. 
The casts which I have considered as most nearly allied to Dr. Tuomey’s 
species, so far as I can judge of its characters from his description, are 
broadly pyriform and but slightly convex on the top, the inner volutions 
scarcely rising above the surface of the body whorl, in this feature agree- 
ing with his statement, ‘spire depressed, almost flat.” The form of the 
outer volution is depressed convex above, but not flat, the surface slightly 
sloping in some individuals from the suture to near the point of great- 
est diameter, and regularly rounded on the sides and’,below, but ex- 
tended into a long, slightly curved beak and wide open canal in front 
when perfect, which is very rarely the case. Only a single individual has 
been found preserving this portion of the cast entire among all this group 
of shells seen from New Jersey. The volutions are abo ut three in num- 
