OSTREA. 283 



Schroeter Einl. iii. p. 354. Gmelin, p. 3338. 



Pedalion Ephippium. Solander's MSS. 



Perna Ephippium. Lamarck Syst. des Anim. p. 134. 



Perna. Enc. Method, t. 176. f. 2. 



Lister Conch, t. 227- f. 62. Klein Ost. t. 8. f. 18. Seba, 

 iii. t. 90. f. 1, &c. Knorr, vi. t. 21. f. 1. 

 Inhabits the Asiatick Ocean. Linnmis. Coasts of Tranque- 



bar. Chemnitz. Cape of Good Hope. Schroeter. Luconia 



and Pulo Condore. Humphreys. 

 Shell varying from two to five inches long, and about equally 



broad, with the valves nearly flat, transversely wrinkled, and 



rather ponderous ; the colour is purplish black, ferruginous 



or dark violet, and the inside is pearly. 



alata. 81. Shell oblong, flattish, brittle, pellucid, 

 and dilated towards the margin ; hinge 

 oblique. 



Ostrea alata. Gmelin, p. 3339. 



Ostrea, No. 93. Schroeter Einl. iii. p. 356. 



Ala Corvi. Chemnitz, vii. p. 253. t. 59- f. 581. 

 Inhabits the coasts of the West India Islands. Chemnitz. 

 Shell about half an inch long, and an inch and a quarter broad; 



and is said by Chemnitz to be wing-shaped ; it is very brittle, 



blackish on the outside, and somewhat pearly within. 



picta. 82. Shell oblong, thin, pellucid, becoming 

 narrower towards the hinge, and the oppo- 

 site end dilated ; margin very acute. 



Ostrea picta. Gmelin, p. 3399. 



Ostrea, No. 91. Schroeter Einl. iii. p. 355. 



Area Mytiloides. Martini Besch. Berlin Naturf. iii. t. 7. 

 f. 23 and 24. 



Concha alam Phasiani representans. Chemnitz, vii. p. 243. 

 t. 58. f. 575. 

 Inhabits the Red Sea. Forskael. 

 Shell about two inches long, and fourteen lines broad at the 



base, and in form somewhat resembles the common muscle ; 



the colour is yellowish brown variegated with darker undu- 

 lated longitudinal stripes. 



legumen. 83. Shell linear, straight, very brittle, 

 and diaphanous ; hinge oblique. 

 Ostrea Legumen. Gmelin, p. 3399* 



