264 OSTREA. 



Ostrea la?vis. Maton and Racket, in Lin. Tram. viii. p. 



100. t. 3. f. 5. 

 Pecten laevis. Pennant Zool. iv. p. 102. Montagu Test. 



p. 1.50. t. 4. f. 4. and Supp. p. 6i. 

 Enc. Meth. t. 214. f. 6. 



Inhabits the coasts of Britain. Pennant, fyc. 



Shell but little more than half an inch long, and the length ra- 

 ther exceeds the breadth ; of a greyish glossy white colour, 

 and marked only with slight irregular concentric wrinkles ; 

 one of the auricles is very large, and the other very small, 

 and it may be readily known from O. obsoleta, by its want 

 of the decussated striae. 



triradiata. 38. Shell roundish-triangular, glab- 

 rous, with about five plaits, and extremely 

 minute longitudinal striae ; valves nearly 

 equal. 



Ostrea triradiata. Midler Zool. Dan. ii. p. 25. t. 60. f. 1 

 and 2. Gnielin, p. 3326. 



Pecten Danicus. Chemnitz, xi. p. 265. t. 207. f- 2043. 



Enc. Method, t. 212. f. 6. 

 Inhabits the coasts of Norway on Fuci. Midler. Denmark. 



Chemnitz. 

 Shell about an inch long, and the length and breadth are nearly 



equal; one of the auricles is large, and the other very small; 



the colour is red, studded all over with white dots. Pecten 



Danicus of Chemnitz appears to be the same species, and 



differs principally from Muller's O. triradiata, in being an 



inch and a half long. 



Solaris. 39. Shell orbicular, flattish, glabrous, 

 with twenty convex rays, and intermediate 

 longitudinal striae ; ears nearly equal. 



Ostrea Solaris. Born Mm. p. 106. t. 6. f. 4. 



Pecten solans. Chemnitz, vii. p. 336. t. 67- f. 638 to 640. ? 



Inhabits the Adriatic. Chemnitz. 



Born has described this species to be an inch and a half long, 

 and only fourteen lines broad, but in his figure the length and 

 breadth are represented to be equal ; it is said to be of an 

 orange colour; both Schroeter and Gmelin have quoted 

 Bom's figure for O. glabra, but that species has never much 

 more than half as many ribs. 



glabra. 40. Shell sub-orbicular, compressed, gla- 



