276 OSTKEA. 



inside, especially towards the hinge ; the lower valve is larger 

 and more convex than the upper, has about five obtuse plaits 

 on each side, and ends at the hinge in a short beak. Some 

 Conchologists have considered this to be the same as the fos- 

 sil species described by Linnaeus under the name of O. dilu- 

 viana. 



cristata. 65. Shell roundish, with transverse imbri- 

 cated membranes, and the summit of one 

 valve produced ; margin obtuse, and toothed. 

 Ostrea cristata. Born Mus. p. 112. t. 7- f. 3. Gmelin, p. 



3337. 



Ostrea, No. 113. Schroeter Einl. iii. p. 374. 

 Variety. Shell rather oblong. 



Ostrea stellata. Gmelin, p. 3337. 



Ostrea, No. 119- Schroeter Einl. iii. p. 377. t. 9. f. 7- 



Inhabits 



Born has described this shell to be twenty-two lines long, and 



sixteen broad, covered with imbricated transverse membranes, 



and the colour white with scattered black spots. O. stellata 



of Gmelin is badly defined, and is probably only a variety of 



this species. 



korskalii. 66. Shell oblong, longitudinally plait- 

 ed and wrinkled transversely ; one valve flat, 

 and the other terminating in a long incurved 

 hollow beak. 



Ostrea Forskalii. Chemnitz, viii. p. 30. t. 72. f. 671. Gme- 

 lin, p. 3336. 

 Ostrea, No. 104. Schroeter Einl. iii. p. 369- 

 Ostrea. Eric. Meth. t. 181. f. 5. 



Inhabits the coasts of Egypt. Forskael. 



Shell two or three inches long, and about half as broad ; with 

 the fiat valve dirty white, and the other clouded with violet 

 and rusty brown ; it is marked transversely with imbricated 

 wrinkles, and longitudinally plaited towards the margin. 



rostrata. 67. Shell oblong, with the upper valve 

 flattish, and the lower longitudinally furrow- 

 ed, striated and produced at the summit. 



Ostrea rostrata. Gmelin, p. 3336. 



Ostrea rostrata minor. Chemnitz, viii. p. 36. t. 73. f. 676. 

 Ostrea, No. 107. Schroeter Einl. iii. p. 370. 

 Gualter, t. 102. f. D. 



