MOLLUSCA. 785 



low which there was a narrow, revolving concave band and then 

 a row of rather broad, low and short, somewhat obscure nodes. 

 Other casts from the Wenonah sand (pi. xcvi, figs. 5-6) have 

 but a single slight columellar fold and approach somewhat in 

 their general form the illustrations of P. hella, but differ from 

 that species in their lower volutions and consequent shorter spire. 

 All the shells of this genus have characters which seem to ally 

 them to some of the forms referred to Odontofwsus, and further 

 material in a more satisfactory condition of preservation than 

 has yet been obtained, is highly desirable and indeed absolutely 

 necessary, in order to make clear our understanding of these 

 forms. 



Formation and locality. — Clififwood clay ?, Cliffwood Point 

 (185) ; Wenonah sand ?, near Crawfords Corner (126^) ; Nave- 

 sink marl, Crosswicks Creek (Whitfield). 



Genus RosTELLiTEs Conrad. 



Rostellites texturatus Whitfield. 



Plate XCVI., Figs. 12-13. 



1868. Rostellites Texanus Cbn., Cook's Geol. N. J., p. 730. 



(Not R. texanus Conrad, 1855.) 

 1892. Rostellites texturatus Whitf., Pal. N. J., vol. 2 (Monog. 



U. S. G. S., vol. 18), p. 88, pi. II, figs. 5-6. 



Description. — "Shell rather large, very elongate, elliptical in 

 •outline, pointed at each extremity, spire very short, conical, with 

 scarcely convex volutions, three to four in number; body volu- 

 tion large forming about six-sevenths of the entire length, very 

 gently convex throughout its entire length, except near the 

 anterior end, where it becomes very slightly recurved; aperture 

 very large, but narrow, acute above and below; columellar plaits 

 unknown; surface of the shell marked by spiral ridges and by 

 vertical lines; the former much the stronger and alternating in 

 size where preserved sufficiently well to show; the vertical lines 

 cut the spiral ridges so' as to break them into nodes on the outer 

 shell." (Whitfield.) 



50 PAL 



