VENTS. tftt 



VENUS. 



Shell with two valves : hinge with three teeth, 

 all near tog-ether ; one of them placed longitudi- 

 nally, and inclining outwards. 



A. Somewhat heart-shaped, \ to 19. 



B. Someivhat orbicular, 20 to 25. 



C. Oval, and mostly angular on the cartilage side, 3G 



to 35. 



A. Someivhat heart-shaped, 1 to 19. 



1. Venus spinifera. Spinous Venus. 

 Montagu, pi. 17- f. 1. 



Shell somewhat oval and rather triangular, yellowish- 

 white, with numerous fine raised parallel equidistant con- 

 centric ridges, which reflect a little, and at the anterior 

 sides in both valves become confluent in pairs, so as to form 

 short obtuse spines, which turn back and make a deep ca- 

 vity for the cartilage : beaks small, nearly central, a little 

 inclining to one side, with an elongated heart-shaped de- 

 pression under them ; inside smooth, white, with the mar- 

 gin plain ; in one valve a single strong tooth, with a small 

 cavity and a remote lateral plate on each side ; in the other 

 valve two teeth, without the lateral plates : length half an 

 inch ; breadth rather more. 



Some of the young shells of V. Gallina much resemble 

 this, but the plain margin and the disposition of the teeth 

 at once distinguish it. 



South of Devonshire : rare. v. m. 



2. Venus verrucosa* Warty Venus. 



Lister, pi. 284. f. 122 Pennant, pi. 57. f. \T)a Costa, 

 pi. 12. f. ILinn. Trans, vi.pl. l/.f. 5, (J Donovan, -pl>44 

 Dorset Cat. pi. 8 f. 1. 



Venus cancellata. Donovan, pi. 115. The young shell. 



Shell strong, thick, very convex, roundish but a little 



produced on the anterior side, rugged, with strong raised 



thin transverse ridges, which turn a little up ward/; .towards 



the hinge, a little waved on their edges, and broken to- 



x 2 wards 



