224 PALEONTOLOGY OF NEW JERSEY. 



Formation and locality: In the upper layers of the Upper Green Marls 

 at Shark River, and at Farmingdale, New Jersey. J^-oni the collection of 

 Dr. Kneiskern, now at Rutgers College, and from that of Dr. Lawrence 

 Johnson, of New York City. 



CASSIDID^. 



Genus CASSIDAEIA. 



Cassidaeia carinata Lam. ? 



Plate XXXIV, Figs. 18-33. 



Cassidaria carinata Lam. : Hist., vol. 7, p. 217, of Deshayes and various authors. 



Shell below a medium size, subglobose in general outline, but higher 

 than broad; whorls from four to five in number, the. principal one large and 

 bordered by a broad reflected lip; spire moderately elevated, the volutions 

 distinctly but not largely exsert, but sharply carinated; body volution 

 marked by from three to five spiral carinations, three of which are dorsal 

 and strong, the other two being on the lower slope of the volution and not 

 always distinct; carinations nodose, the superior one having fewer and 

 stronger nodes than the next two, while on the two inferior carinas the 

 nodes are seldom shown. The volutions of the spire are also nodose on the 

 carination, the nodes being small and very numerous; aperture large, the 

 outer lip reflected, forming a wide, flange-like border; base of the shell 

 extended into a rather long, recurved, twisted beak and canal; surface of 

 the shell marked by fine spiral raised lines. 



This shell is exceeding like Cassidaria carinata Lam., from the Paris 

 Basin Eocene, and imitates all the variations through which that one passes. 

 In fact, it is very difficult to say why it is not the same species, and I have 

 therefore placed it under the same specific name. It corresponds in nearly 

 all points with P. hrevldenta Aldrich, Jour. Cin. Soc. Nat. Hist., July, 1885, p. 

 152, PI. 3, Figs. 19« and 20, but there is no evidence of the single varix on 

 the Avhorls as in that one, although I have not seen quite enough of the 

 matrix to ascertain positively if it may not have been provided with this dis- 

 tinctive mark. 



Formation and locality: In the upper layers of the Upper Green Marls, 

 at Shark River, New Jersey. Collections of Rutgers College and Am. 

 Mus. Nat. Hist. 



