98 PALEONTOLOGY OF NEW JERSEY. 
pamid@, while Mr. Meek classed it, as does Tryon, with the Cancellariide, to 
which it would seem to be clearly related if it were examined only in the 
condition of internal casts; but this idea is at once dispelled by examining. 
the figure given by Mr. Conrad of the perfect shell. 
Formation and locality: In the Lower Marls of the Cretaceous. “Mr. 
Gabb gives only New Jersey as the locality of this specimen, the only ones 
which I have seen, and from the charactér of the marl I should think they 
came from the brown layers near Burlington, New Jersey. 
Genus TURBINOPSIS Conrad. 
Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, p. 289. 
“Turbinate; spire conical; whorls channeled at the suture; umbilicus 
profound; inner and outer lip continuous above and separated from the 
body whorl; columella concave with a very oblique fold near the basal 
margin.” The species described under the generic description is T. Hilgardi 
from the Cretaceous strata in Tippah County, Mississippi. Under his 
remarks on the genus, following the generic description, Mz. Conrad says: 
“There appear to be two or more species of this genus in the Cretaceous 
strata of New Jersey, occurring in the state of casts, one of which I think 
is identical with the present shell.” Among the casts from New Jersey I 
have recognized three, if not four species, referable to this genus, although 
they appear to differ slightly in character from 7. Hilgardi in the posses- 
sion of more or less distinct vertical folds, and some of them possibly in the 
absence of spiral lines, while the oblique fold at the base of the columella 
is certainly known to be present in only one of the number. The casts are 
peculiar and rather readily recognized from their widely disconnected whorls 
and very large open umbilical cavity. Ido not think the oblique fold at 
the base of the columella is a feature always present in the shell, as 
there is not the slightest evidence of its existence on the majority of the 
casts, even where the features of the columellar lip of the aperture are 
preserved in the most perfect manner. The columella seems always 
to have been concave, although in some individuals only very moder- 
ately so, and the base of the aperture is always shown to have been 
acutely angular. The genus, although somewhat obscure in its char- 
