172 ANIMALS OF THE SEASHORE 



(a) Littorina saxatila; (b) L. obtussata; (c) Lacuna vincta; 



(d) Paludestrina minuta; (e) Columbella lunata; (f) Odostomia 



impressa; (g) O. seminuda; (h) Triphora perversa nigrocincta; 



(i) Bittium alternatum; (j) Actoocina canaliculata; 



(k) Natica pusila. 



Odostomia impressa Say 



Fig. 28 F 



A small smooth shell (less than 14 inch long) 

 occasionally found on sea weed between the tides 

 and in shallow water. 



Odostomia seminuda C. B. Adams 



Fig. 28 G 



Similar in general appearance and habits to 

 the above, but distinguished by its more granulated 

 surface. 



Turbonilla 



This is a genus composed of numerous species of 

 minute shells, several of which are to be found in 

 New Jersey waters. They are long, slender spiral 

 shells, seldom reaching % inch in length. The 



