204 PALEONTOLOGY OF NEW JERSET. 



manner, but without the distinctive angulations. Young specimens of that 

 species show the nodes increasing in size and becoming more rounded as 

 the volutions increase in size, while on this one they gradually disappear. 

 It differs from F. Samsoni in the less compact and more slender spire and 

 less ventricose volutions, these differences being very pronounced when the 

 specimens are viewed side by side. The general resemblance to the other 

 two species is very marked. 



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

 at Shark River, New Jersey. Collection Am. Mus. Nat. History. 



Fasciolaria Samsoni, n. sp. 

 Plate XXVII, Fig. 4 ; Plate xxviii, Figs. 1, 2. 



Shell large and ponderous, as indicated by the cast, with an elevated 

 spire, strong, extended beak, and strong, heavy, rounded volutions ; apical 

 angle, when the specimens are uncompressed, measuring about 45° or 50°; 

 volutions numbering six to seven in the entire cast, with strongly marked 

 suture lines, their full, rounded and ventricose forms relieving the sutures, 

 but without any marked space between the volutions ; aperture large, semi- 

 lunar in outline, more strongly rounded in the lower part than above, but 

 terminating in a narrow canal below; columella strong, its entire length 

 unknown, and the plications of folds unknown, as they are not visible on 

 any of the casts examined, the extension not being preserved; surface of 

 the volutions smooth so far as can be determined from the cast, these being 

 marked only by transverse lines of growth parallel to the aperfural margin. 



This species is found associated with T. Hercules, and is often consid- 

 ered as a smooth variety of that shell. They are, however, very distinct, 

 and evidently belong to two distinct sections of the genus, F. Hercules be- 

 longing to the group tj^pified by F. trapezium Linn., while this one is related 

 to F. tuUpa of our own southern coast; although much larger, more ventri- 

 cose, and having a proportionally shorter spire than any specimens or species 

 of that type known to me. It is barely possible there may have been re- 

 volving depressed lines on the surface, as in some lights there are faint 

 indications of such a feature on the best preserved example, that figured; 

 but they are altogether too indistinct and evanescent to be given as a posi- 



