93 PALEONTOLOGY OP NEW JERSEY. 



pamidce, while Mr. Meek classed it, as does Tryon, with the CanceUariidcB, 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 b}' Mr. Coui-ad of the perfect shell. 



Formation and localifi/: In tlie Lower Marls of the Cretaceous. Mr. 

 Gabb gives onl}' New Jersey as the locality of this specimen, the only ones 

 which I have seen, and from the character of the marl I should think they 

 came from the brown layers near Burlington, New Jersey. 



Genus TURBINOPSIS Conrad. 



Jour. Acad. Nat. Sci., PMla., 2d ser., vol. 4, p. 389. 



"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, Mr. 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 T. 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. I do 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- 



