Class VI. VENUS. VENUS-SHELL. 201 



GENUS XL VENUS. VENUS-SHELL. 



Animal, a Tethys. 



Hinge with three teeth near to each other; 

 one placed longitudinally, and bent out- 

 wards. 



* Fore-part spiny. 





Lin. Tr. viii. 78- Mont. Test. Br. 577. id. 



1. SPINJ- 



Sup. t. 17./. 1. 



FERA. 



* V. with a somewhat triangular shell ; ridges 

 numerous ; anterior edges spinous. 



Found in sand from Salcombe bay, rare. 



## Without spines. (A.) Somewhat heart- 

 shaped. 



Gm. Lin. 3269. Mont. Test. Br. 112. 574. 2. verru- 



Lin. Tr. viii. 78. V. erycina. Br. Zool. iv. g4. cosa. 



V. with a very thick shell, marked with high- 

 ridged ribs transversely; undulated longitu- 

 dinally. 



Circumference about five or six inches. 

 Tab. lvii. f.\. 



