70 SOLEN. 



Inhabits the coasts of England. Lister, fyc. Norway. Lin- 

 naus, Denmark. Mutter. Greenland. Fabricius. 



Shell a quarter, or sometimes near half an inch long, and almost 

 twice as broad, of an oval-oblong, or somewhat rhombic 

 shape ; white, opake, brittle, and wrinkled transversely ; each 

 valve has two rows of spines which run from the apex to 

 the anterior margin ; the valves are dissimilar, and one over- 

 laps the other, except at the end which is most truncated. 

 Fabricius and Bruguiere have supposed the Solen minuius, 

 and Mya arctica of Linnaeus to be the same, and the de- 

 scriptions are so very similar that it does not appear to me at 

 all doubtful. 



virens. 31. Shell ovate-oblong, with the umbones 

 tumid. 



Solen virens. Linnaus Syst. Nat. p. 1115. Gmeiin, p. 

 3226. Wood's Conch, p. 132. 



Inhabits Java. Linnaus. 



No subsequent author appears to have ascertained this species, 

 and the following is the description given by Linnaeus : 

 " Shell with the valves unequal, and the umbones gibbous, 

 white, with a greenish outside, very brittle, diaphanous, in 

 shape resembling Mya pictorum, and hardly closed at either 

 extremity ; the hinge has two approximated teeth in one 

 valve, but none in the other, and in each valve there is be- 

 sides, a callus like an obsolete tooth." 



squamosus. 32. Shell sub-orbicular, and minutely 

 punctured ; hinge with two bifid teeth diverg- 

 ing from the umbo. 



Solen squamosus. Montagu Test. p. 565. Maton and 

 Racket, in Lin. Trans, viii. p. 48. Wood's Conch, p. 

 140. 

 Found on the coast of Devonshire. Montagu. 

 The following is the description which Mr. Montagu has given 

 of this extraordinary shell : " S. with an extremely flat, pel- 

 lucid, white shell, of a sub-orbicular shape ; most minutely, 

 and elegantly punctured all over, appearing under a common 

 pocket lens, like fine shagreen ; besides which, there are a 

 few obscure, concentric wrinkles, most conspicuous round 

 the margin : umbo very small, pointed, ceutral, and not 

 turning to either side. Inside smooth, glossy white, with 

 obscure striae radiating from the hinge ; margin plain, and 

 rather more opake than the rest of the shell : teeth two, 



