772 CRETACEOUS PALEONTOLOGY. 



or ridges, and by remarkably strong vertical folds, numbering 

 12 or 13 on the last volution, and transmitting their features 

 only very slightly tO' the internal cast at the point of greatest 

 diameter, but showing on the inside as above stated for more than 

 half its depth." (Whitfield.) 



Remarks^ — This species has not been met with in the recent 

 collections of the Survey, and seems to be known only from the 

 single type specimen used by both Gabb and Whitfield in their de- 

 scriptions. 



Formiation and locality. — Navesink marl, Monmouth County 

 (Gabb). 



Geographic distribution. — New Jersey. 



Genus Caric^lla Conrad. 

 Caricella plicata Whitfield. 



Plate XCI, Figs. 7-8. 



1892. Caricella plicata Whitf., Pal. N. J., vol. 2 (Monog. U. 

 S. G. S., vol. 18), p. 182, pi. 23, figs. 1-2. 



Description. — "Shell small, turbinate or pyriform, with a 

 short, broadly conical spire having an apical angle of about 85". 

 Volutions four or more, not exceeding five, the apical one mam- 

 millated; upper surface sloping in the 'direction of the spire, 

 slightly angulated at the point of greatest diameter and the 

 lower extremity slightly attenuated ; body of the volution ventri- 

 cose ; aperture large, nearly three- fourths the length of the shell, 

 oblique and somewhat elliptical in general form, canaliculate 

 below. Columella slight, as shown by the cavity left by its 

 removal, marked by four very distinct, oblique, equi-distant 

 folds, the upper one of which is situated nearly at the middle of 

 the length of the aperture. Body volution marked in the cast 

 by about 12 very oblique vertical folds, which are directed 

 very strongly forward in passing from above downward, but 

 are confined entirely tO' the region of the angle near the top of 

 the volution. No positive evidence of other surface markings 

 can be detected on the casts." (Whitfield.) 



