742 CLASS XII. 
striated, inequilateral, anteriorly truncato-rotundate, orbiculari- 
trigonal or oblique, incrassated towards the points. 
Astarte danmoniensis Sow., Crassina danmoniensis LAM., Venus crassa- 
tella Buatnv. Malac. Pl. 75, fig. 7. The fossil species are numerous in 
the later secondary, and in the tertiary formations. Comp. Dr La Jon- 
KAIRE Note sur le genre Astarte, Mémoires de la Soc. d’ Hist. nat. de Paris, 
I, 1823, pp. 127—131, Pl. vi. 
Venus L. (exclusive of species). Cardinal teeth in some three 
in each valve, in others four in left valve. Lateral tooth none. 
Impression of mantle below the posterior muscular impression 
deeply sinuate. (Animal Callista Pout.) 
a) Cardinal teeth four in left valve, with fourth elongate, situated under 
lunula, compressed, received in a foveola of right valve. 
Cytherea Lam. 
Venus lusoria, Cyth. lusoria Lam., Venus chione L. (in part), RUMPH. 
Amb. Rariteith. Tab. xt. fig. a, Encycl. méth., Vers. Pl. 270, fig.1. The 
Chinese and Japanese cover the inside of these shells with gold and colours, 
and use them in a certain game.— Venus Dione L., RumPH. Amb. Rariteith. 
Tab. xvi. fig. 4, Encycl. méth., Vers. Pl. 275, fig. 1, Hourruyn Wat. 
Hist, 1. 15e Stuk, Pl. 117, fig.6; East Ind. Seas. This species is described 
by Linn2vs in detail and metaphorically, Syst. nat., ed. 12,1. p. 1129, &c. 
b) Cardinal teeth three in each valve, approximate. 
Venus Lam. 
Sp. Venus plicata Gu., Lam. (Venus Dysera L. in part), D’ARGENV. Con- 
chyl. Tab. 21, fig. K, Eneycl. méth., Vers. Pl. 275, fig. 3; Venus papilio- 
nacea LAM. (Venus rotundata L.), Cuv. R, Ani., éd. ul., Moll. Pl. 104, 
fig. 4, &c.1 
Cyprina Lam. Shell obliquely cordate, thick. Hinge with 
three unequal teeth, and lateral tooth remote, posterior, situated 
under the fissure. Impression of mantle rotundate, entire. (Ani- 
mal with traches short, scarcely porrect beyond the margin of 
shell.) 
Sp. Cyprina islandica Lam., Venus islandica L., MuELL, Zool. Danic. Tab. 
28, Buainv. Malac. Pl. 70 bis, fig. 5, Cuv. R. Ani., éd. ill., Moll. Pl. 102, 
1 The species belonging to the genus Venus (Venus and Cytherea LaM.) are so 
numerous, that they make up nearly 2 of all the known lamellibranchiata, so that this 
genus much surpasses the genera Jellina, Cardium, Arca, Ostrea and Pecten so rich 
in species. 
