136 Mr. Gray on some Species of Shells [Feb. 



LithophagjE. The whole of the genera of this family appear 

 to have very great affinity to the Cardit(B, Cypricardia:, &c. and 

 should be placed nearer to them in a natural arrangement as 

 well as the latter genera themselves ; but these genera appear to 

 be the most defective part of Lamarck's arrangement. 



Petricola costata, Lam. Syst. Venus Lapicida, Chemn. x. 

 f. 1665, 1666. 



Pet. divergens. Venus divergens, Gmelin. 



Pet. nivea. Mytilus niveus, Chemn. viii. t. 82, f. 734. 



Pet. suborbicularis. Mya suborbicularis, Montague. 



Pet. bidentata. Mya bidentata, Montague. 



Pet. nibra. Cardium rubrura, Montague. 



Venerupis monstrosa. Venus monstrosa, Chemn. vii. f. 42. 



Ven. decussata. Mya decussata, Montague. 



Tellina tenera. I^acrogfta tenera, Leach. 



LuciNA Child? en (cr^Testdi suborbiculata ineqiiivalvis alba 

 subantiquata ; tenuissime radiata substriata : long. 3unc. Brazil, 

 Humphrey s.noh. Zool. Jour. i. 221. 



Luc. gihba. Tellina divaricata var. Chemn. vi. f. 130. 



Luc. globosa. Venus globosa, Chemn. vii. f. 430, 431. 



Luc. scabra. TeUina scabra, Chemn. xi. f. 1943, 1944. 



Luc. divaricata. var.? Tellina dentata. Wood, t. 46, f. 6. 



Tellenides? triangularis. Tellina triangularis, Chemn. vi. 

 t. 10, f. 85. 



Don AX veneroidea. Venus donaci formis, Chemn. xi. f. 1983, 

 1984. 



Don. scalpelhim. Testa elongata, complanata, tenuis purpu- 

 reo radiata, polita, tenuissime radiato-striata ; antice valde elon- 

 gata rotundata, lutea ; jjostice oblique truncata, biangulata, 

 purpurea, margine minute denticulato. 



Crassina borealis. Venus boreahs, Chemn. vii. f. 412 — 414. 

 Cyrena! depressa. Lam.? 



Crass, triangularis. Mactra triangularis, Montague. 



Crass, niinutissima . Mactra minutissima, Montague, An var. 

 prioris ? 



Crass, minima. Venus minima, Montague, t. 3, f. 3. 



Crass, subcordafa. Venus subcordata, Montague, t. 3, f. 1. 



Crass, sulcata. Venus sulcata, Montague, Lam. 427. 



Crass. Montagui. Venus compressa, Montague, t. 26, f. 1. 



Crass. Scodca. Venus Scotica, Maton, Lin. Trans, t. 2, f. 3. 

 Lam. 455. 



Ci'ass. Banksii. Nicania Banksii, Leach. 



Crass, striata. Nicania striata. Leach. 



Cyrena cyprinoides. Testa cordato-trigona, gibba, olivacea, 

 concentrice sulcata; cardine incrassata, dentibus lateralibus 

 leevibus, anteriori conico cgeteris approximato. Japan, long. 

 16-16, unc. 



