4*66 MOLLUSCA. MYAD.E. Pandora. 



Length a quarter of an inch, breadth half an inch ; cuticle brown, wrink- 

 led ; truncate anteally ; beaks rather prominent, with the points not quite 

 opposite, but divaricating from each other ; the elevated tooth running in a 

 gradually narrower and wedge-shaped manner, nearly half way along the 

 back margin. 



583. S. Swalnsonl. — Shell oval, wedge-form, with the con- 

 cave tooth projecting horizontally inwards. 



Turt. Biv. Brit. 37. t. iii. f. 3. t. xix. f. 2.— In rocks, Torbay. 

 Length a quarter of an inch, breadth half an inch ; rounded retrally. 



Gen. CXLII. PANDORA. — Shell inequivalve, inequilate- 

 ral ; two unequal teeth in each valve. 



584. P. incequivalvis. — Dorsalfmargin behind, nearly straight; 

 left valve smooth, the right valve concentrically striated. 



Tellina in. Linn. Syst. Nat. 1118. Don. Brit Shells, t. lxi. Mont. Test. 



Brit. 75. ib Solen pinna, ib. 566. t. xv. f. 3 — P. margaritacea, Turt. 



Biv. Brit. 40. t. cxi. f. 11, 12, 13, 14. — English shores, rare. 



Length half an inch, breadth an inch ; oblong, white, glossy ; anterior ex- 

 tremity rounded ; retral extremity produced and subrecurved ; the left valve 

 along the dorsal margin angular and incurved. — It appears from the observa- 

 tion of M. Eudes Deslongchamp, that on each side the mouth are two long 

 tentacula, directed retrally ; and that the marginal impression of the cloak 

 consists of a series of from 15 to 16 rounded muscular markings, two or three 

 of which are connivent. — Bulletin des Sciences, Fev. 1827, 297- 



Gen. CXLIII. GALEOMA. — Equivalve, equilateral, trans- 

 verse ; with a large oval gape at the front margin ; hinge 

 without teeth. 



585. G. Turtoni. — Tumid in the middle, compressed to- 

 wards the extremities, which are rounded and closed. 



Turt. Zool. Journ. No. 7« 364. t. xiii. f. 1. — English Channel. 



Length two lines and a half, breadth not quite half an inch ; dirty white, 

 the surface covered with close set, irregular transverse interrupted opaque 

 lines ; beaks prominent. 



