Glass VI. VENUS. VENUS-SHELL. 20) 



GENUS XL VENUS. FENUS-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. 5>Tl. id. I. SPiNr- 



Sup. t. 17. f. 1. ^^'''• 



* V. with a somewhat triangular shell ; ridges 

 numerous ; anterior edges spinous. 



Found in sand from Salcotnbe bay, rare. 



** Without spines. (A.) Somewhat beart- 

 shaped. 



Gm. Lin. 326g. " Mont. Test. Br. 1]2. 574. 2. VERRU- 



Lin. Tr. viii. 78. V. erycina. Br. Zool. iv. g4. ^o^^' 



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

 ridged ribs transversely; undulated longitu- 

 dinally. 



Circumference about five or six inches. 

 Tab. Ivii. J'. I, 



