140 SOLEN. 



versely striated, or rather wrinkled, with a single tooth 

 in one valve inserted into a corresponding cavity in the 

 opposite valve. The specimens found in England are 

 not more than a quarter of an inch from hinge to 

 margin, and half an inch in breadth ; but they have been 

 found of double those dimensions, on some of the Eu- 

 ropean shores. 



Mr. Montagu found the S. minutus burrowed in hard 

 lime stone, at Plymouth, but it is very rare as a British 

 species. It inhabits Norway and Greenland. 



SCALE-LIKE RAZOR. 



34. Solen squaramosus. S. testa suborbiculari ; cardinis dentibus duobus 

 bifidis, ab umbone diver gentibus. Linn. Trans. 8. p. 48. 



Shell somewhat orbicular ; hinge with two bifid teeth, diverging from the 

 umbo. 



Mont. Test. Brit. p. 565. Penn. Br. Zool. v. 4. p. 175. 



A very thin, pellucid, white shell, extremely flat, of a 

 somewhat circular shape, and in appearance like the 

 scale of a fish. The outside is covered with minute 

 punctures ; the inside is smooth, white, and glossy. The 

 teeth, which are two, are thin and erect. 



Mr. Montagu, who has added this species to the list 

 of British Testacea, has found a single valve only, on 

 sand in Sal comb Bay, Devonshire. It was three eighths 

 of an inch long, and half an inch broad. 



