MOIvLUSCA. 517 



Formation and locality. — Merchantville clay-marl, near James- 

 burg (141) ; Woodbury clay, Lorillard (102) ; Wenonah sand, 

 near Marlboro (130). 



Geographic distribution. — New Jersey. 



Anatina clifwoodensis n. sp. 



Plate LVIL, Pigs. 5-6. 



Description. — Shell small, the dimensions of the type speci- 

 men being: length, about 18 mm.; height, 12 mm.; thickness, 

 6 mm. Shell subovate in outline, apparently a little gaping pos- 

 teriorly, much broader in front than behind. Beaks compressed, 

 directed backward, fissured transversely, situated about seven' 

 ninths of the length of the shell from the anterior extremity, 

 antero-cardinal margin straight and nearly horizontal in front 

 of the beaks, curving downward in front into the broadly rounded 

 anterior margin; basal margin gently convex curving upward 

 more strongly at each end; posterior margin shorter and prob- 

 ably more sharply rounded than the anterior. Valves depressed- 

 convex, more prominent in the umbonal region, abruptly com- 

 pressed towards the postero-cardinal extremity, the anterior and 

 ventral slopes greatly convex. Shell marked by rather fine con- 

 centric lines of growth. 



Remarks. — This species resembles the one described in this re- 

 port as Anatina jerseyensis, but may be distinguished by reason 

 of its smaller size more elongate form, and by the much more 

 posterior position of the beaks. 



Formation and locality. — Cliffwood clay, CHffwood Point 



(185). 



Geographic distribution. — New Jersey. 



Anatina jamesburgensis n. sp. 



Plate LVIL, Pig. 7- 



Description. — The type specimen is only the dorsal portion of 

 a shell preserved as a mould of the exterior, and the ventral out- 

 line can be determined only by restoration from the direction of 



