40 



SOLENID^. 



Fig. 365. 



the beaks to the middle of the base. Interior smooth, showing 



the external furrow, the 

 upper and anterior edge 

 turned outwards so as 

 to present large, smooth 

 callosities over the Ijeaks. 

 The process fi-om within 

 the cavity of the Ijcaks 

 is large, narrow, and a 

 little flattened at the tip. 

 Length, two inches ; 

 height, one inch and a 

 half. 



A very perfect specimen of this shell is in the cabinet of Dr. S. 

 Bass, which was found at Phillips's Beach. Young specimens were 

 found in hard clay at Phillips's Beach by Mr. Joseph True. They 

 differ principally in gaping only anteriorly. Full-grown valves are 

 occasionally thrown up on all our beaches ; l)ut it is more common at 

 the South, as along the shores of New Jersey. When alive, a mem- 

 branous expansion covers the superior l)order of the shell. 



Nahant Beach, very large, fresh {Haskell).; Sable Island, gigan- 

 tic ( Willis) ; Rimouski (^Bell) ; aljundant in Charleston Harbor, 

 S. C. (^Stimpson). It is common in all the seas of Northwestern 

 Europe. 



Z. crispata. 



Family SOLENID^. 



Shell equivalve, greatly elongated, rather cylindrical, gai)i)ig at 

 both ends. 



Ocmis SOL.EN, Lin. 1758. 



Shell with the sides nearly parallel ; Ijeaks very small, terminal ; 

 cardinal teeth small, rounded, variable. 



Solen ensis. 



Shell six times as long as liigli, curved, front and l)ack parallel, smooth, yellow- 

 ish-green; hinge with one tooth and a sharji lateral ])late of one valve entering 

 between two teeth and a double plate of the other. 



Solen ensis, Lin. Syst. Nat. 1114. — Pennant, Brit. Zool. iv. 84, t. 45, fig. 22. — Chemn. 

 Conch, vi. 47, t. 4, fig. 30c. — Montagu, Test. Brit. 48. — Brug. Encyc. Meth. pi. 



