'-230 OSTREA. 



edulis. 74. Shell oblong-orbicular, very rugged, 

 with imbricated transverse membranaceous 

 wrinkles, and the upper valve flat. 

 Ostrea edulis. Linnaus Syst. Nat. p. 1184. Pennant 

 Zool. iv. p. 104. t. 62. f. 70. Born Mas. p. 113. Chem- 

 nitz, viii. p. 48. t. 74. f. 682. Schroeter Einl. iii. p. 

 363. Gmelin, p. 3334. Montagu Test. p. 151. Ma- 

 ton andRacket, in Lin. Trans, viii. p. 101. Lamarck 

 Syst. des Anim. p. 132. Dorset Cat. p. 38. t. 11. f.6. 

 Ostreum vulgare. Da Costa Brit. Conch, p. 154. t. 11. 



f.6. 

 Bonanni Rec. 2. f. 70, and Kirch, f. 68. Lister Anim. 

 Ang. t. 4. f. 26. Gualter, t. 102. f. A and B. Knorr t 

 iii. t. 24. f. 2, and t. 25. f. 2. 

 Inhabits the sea-shore every where. Born. 

 This shell varies much in shape and size according to the situa- 

 tion in which it is found, but is commonly more or less orbi- 

 cular, and very rugged. Pennant, in his British Zoology, 

 and Dale, in the History of Harwich, have related the me- 

 thods of taking, breeding, and fattening oysters, and the for- 

 mer has justly remarked that ' a description of so well known 

 a shell is needless.' 



spondyloidea. 75. Shell ovate, flattish, with lon- 

 gitudinal undulated granulated striae on the 

 upper valve ; summits somewhat beaked, and 

 the margin very sharp. 



Ostrea Spondyloidea. Chemnitz, viii. p. 28. t. 72. f. 669 

 and 670. Gmelin, p. 3335. 



Ostrea, No. 103. Schroeter Einl. iii. p. 368. 



Pedum Spondyloides. Lamarck Syst. des Anim. p. 136. 



Pedum. Enc. Method, t. 178. f. 1. 



Favanne, t. 80. f. K. 

 Inhabits the East Indian Seas. Chemnitz. 

 Shell about three inches and two lines long, and two inches and 



five lines broad ; white, with a few tawny or flesh-coloured 



spots ; the cartilage which connects the valves is external, 



and placed in a deep narrow groove. 



ovalis. 76. Shell oval, very thin, with unequal 

 longitudinal striae, and terminating in a short 

 lateral channelled beak. 



Ostrea ovalis. Gmelin, p. 3337. 



Ostrea, No. ISO. Schroeter Einl. iii. p. 378. t. 9- f. 8. 



