388 TELLINIDJE. 



Genus ANATINELLA, Sowerby. 



Shell transversely oblong, equivalve, rather gaping pos- 

 teriorly ; valves covered with a thin, smooth epidermis. 

 Hinge composed of a spoon-shaped process in each valve, 

 with two small teeth on each side in the right valve, and a 

 single somewhat bifid tooth in the left; cartilage internal, 

 no testaceous appendage. Anterior muscular impression 

 elongate, slender, marginal, hinder oblong triangular ; 

 pallial line simple posteriorly, 



Ex. A. Candida, Chemnitz, pi. 102, fig. 7, 7, a. 



The Anatinella have been compared to Lutrarice without 

 any lateral teeth. One species is from China, one from 

 Ceylon, and a third from the islands of the Philippine 

 Archipelago, where it is found on the sands at low-water. 



Species of Anatinella. 



Candida, Chcm. ventricosa, A. Adams. 



dilatata, A. Adams. 



Fain. TELLINID^E. 



Palps large and triangular. Mantle widely open anteri- 

 orly, and with the margins usually fringed or furnished with 

 short filaments; siphons very long, slender, diverging, 

 separated from each other in their entire length ; gills un- 

 equal, united behind. Foot compressed, broad, geniculate, 

 and linguiform. 



Shell free, regular. Hinge with two cardinal teeth, at 

 most, in each valve ; sometimes lateral teeth ; ligament ex- 



