OSTREA. 265 



brous, with about tea slightly elevated convex 

 ribs, and the inside striated in pairs ; ears 

 nearly equal. 



Ostrea glabra. Linnaus Syst. Nat. p. 1146. Born Mas. 

 p. 105. Schroeter Einl. iii. p. 315. Gmelin, p. 3324. 

 Ostrea flavescens. Gmelin, p. 3321. 

 Ostrea, No. 79- Schroeter Einl. iii. p. 347. 

 Pecten glaber. Chemnitz, vii. p. 338. t. 67. f. 641 to 645. 

 Bonanni Rec. 2. f . 1 1 and 12, and Kirch, f. 10 and 11. 

 Gualter, t. 73. f. H. Knorr, i. t. 8. f. 5. Rege?ifuss,\. 

 t. 1. f. 8 and 10. Favanne, t. 54. f. L 4. Enc. Meth. 

 t. 213. f. 2. 

 Variety. With the ribs more elevated and spotted. 

 Ostrea maculata. Born Mm. p. 105. 

 Gualter, t. 74. f. A, B and C. Knorr, ii. t. 18. f. 5. Re- 

 genfuss, i. t. 3. f. 30 and 31. 

 Inhabits the Mediterranean. Linnaus. Adriatic. Knorr. 

 Coasts of Majorca and Minorca. D'Herbigny. Naples. 

 Ulysses. Portugal. Humphreys. 

 Shell about an inch and a half or two inches long, and the 

 length and breadth are equal ; it is obsoletely striated longi- 

 tudinally, and slightly wrinkled transversely ; the colour is 

 yellowish, reddish, whitish, or pale brown, and the flattest of 

 the two valves is generally either white or paler than the 

 other, and the inside is white, slightly tinged with yellow. 



proteus. 41. Shell sub-orbicular, with about five 

 broad convex plaits, and numerous longitu- 

 dinal striae ; auricles nearly equal. 



Ostrea Proteus. Solander's MSS. 



Pecten discors, seu disconveniens. Chemnitz, xi. p. 264. t. 

 207. f. 2042. 



Inhabits the Mediterranean. Solander. 



Shell about an inch, or sometimes an inch and a half long, and 

 the breadth exceeds the length about two lines ; the colour 

 of the upper valve is reddish or pale brown, sometimes 

 marked with darker transverse zones, and sometimes slightly 

 clouded with white ; the lower valve is generally white. 



opercularis. 42. Shell orbicular, with about 

 twenty convex ribs, and crowded decussated 

 striae ; upper valve more convex than the 

 lower. 



