54 Russell's Familiar Notice of some of the 



A very fine specimen in possession of Wm. Oakes of Ips- 

 which, was obtained by him from the beach of that part of Essex 

 County. 



SANGUINOLARIA. Latin, blood, (allusion to color of some species.) 

 FUSCA. Conrad. Latin, dusky. 



Dusky Sanguinolaria. 



A common and rather pretty bivalve, occurring on the muddy 

 shores of our estuaries. 



May be collected at Winter Island, South River, and else- 

 where in this neighborhood. 

 Cabinet of the Society. 



PANDORA. Greek, no obvious meaning. 

 TRILINEATA. Say. Latin, three lined. 



Three lined Pandora. 



A rare, beautiful and pearly shell, occasionally found on our 

 beaches ; and seldom perfect. Four single valves only have 

 come under my observation, and these much worn, and all right 

 valves, being distinguished easily by their more convex figure. 



About an inch long; posterior margin, very round, anterior 

 beaked. 



Described in Journ. Acad. Nat. Sc. Phil., vol. ii. p. 261, and 

 figured in Says' American Conchology, pi. ii. 

 Cabinet of the Society. 

 My Cabinet. 



SAXICAVA. Bellevue. Latin, saxum, a stone, and cavus, a holhiv. 

 DISTORTA. Say. Latin, crooked. 



Distorted Saxicava. 



The name of Saxicava was given to denote the habits of this 

 animal to hollow out stones for its dwelling ; an instinct, I be- 

 lieve not observable in the present species. The teeth, which 

 are prominent in some specimens, are seen only when young, 

 and become obliterated as the shell arrives arrives at maturity, 

 and the crooked appearance of the valves also disappears. A 

 curious rather than pretty shell, and probably overlooked, except 



