OF CONCHOLOGY. 213 



DECRIPTIONS OF FIVE NEW SPECIES OF OLDER 



EOCENE SHELLS FROM SHARK RIVER, 



MONMOUTH CO., N. J. 



BY T. A. CONRAD. 



PLEUROTOMARIA, Defrance. 

 P. PERLATA, Conr.— PI. 21, fig. 7. 



Description. — Conical-depressed, rapidly widening to the 

 base ; periphery slightly carinated ; body whorl very wide, 

 flattened above; base convex-depressed, slightly indented ou 

 the submargin; umbilicus profound. 



Locality. — Shark Eiver, N. J. 



This is the only Tertiary species known to occur in the 

 eastern beds of this country. It is one of the largest of the 

 genus, and approximates P. supracretacea^ pi. 205, 1, 2 of 

 D'Orbigny's Pal. Franc. 



SURCULA, Adams. 



Subgenus SURCULITES, Conrad. 



S. ANNOSA, Conr.— PI. 20, fig. 9. 



Description. — Turrited; spire elongated; whorls angulated 

 above the middle, with an impressed revolving line above the 

 suture; whole surface marked with fine, revolving, wrinkled 

 lines, becoming large and distinct towards the base. 



Locality. — Shark Eiver, IST. J. 



ACTEONEMA, Conrad. 



A. prisca, Conr. — PI. 21, fig. 3. 



An imperfect cast, distinguished from A. striata by having 

 mach finer and more numerous revolvinsj lines. 



Locality. — Shark River, N. J. 



YOLDIA, Morch. 



Y. PROTEXTA, Conr. — PI. 21, fig. 2. 



Description. — Subequilateral, anterior side longest, posterior 

 end truncated obliquely inwards. 



Locality. — Shark River, N. J. 



