SOLEN, RAZOR-SHELL. 163 



striate concentrically about the ends, but nearly smooth in 

 the middle and towards the hinge ; inside glossy white : 

 hinge not quite central, with the teeth projecting beyond 

 the margin ; in one valve a single subulate tooth, locking 

 between two in the other, one of which is subulate s the 

 other slightly cloven : length about an inch j breadth two 

 and a half. 



On the western coasts : rather rare. v. v. 



10. Solenfragilis. Brittle Razor-shell 



Dorset Cat. pi. 4. f. 5 Wood, pi. 29. f. 4, 5. 



Shell oblong, thin, brittle, transparent, white covered 

 with a dark greenish skin, a little contracted in the middle 

 of the front margin, rounded at both ends, with a faint red 

 longitudinal stripe commencing from the hinge, growing 

 broader and fainter, and at length disappearing towards the 

 front margin ; inside glossy white, with a raised longitu- 

 dinal ridge from the hinge growing broader and obsolete 

 towards the margin ; hinge with a single tooth in one valve 

 locking between two in the other : length nearly half an 

 inch , breadth an inch and a half. 



It differs from the last in being less, broader in propor- 

 tion to its length, quite transparent, and especially in. the 

 raised longitudinal ridge on the inside. 



Dorset coast, Scotland, and the North bull in Dublin bay. 

 v. m. 



11. Solen vespertinus. Variable Razor-shell. 



Lister, pi. 417- f. 261 Pennant, pi. 50. f. 2, and pi. 38, 

 lower fig. Wood, pi. 33. f. 2, 3 Dorset Cat. pi. 5. f. 1, 



Tellina variabilis. Donovan, pi. 41. f. 2. 



Shell oblong-oval, opake, sometimes covered with a 

 blackish-brown skin, pale straw-color with pale purple lon- 

 gitudinal rays, often yellowish about the beaks, rounded at 

 the smaller end, a little truncate and sloping at the other, 

 and striate concentrically ; inside glossy yellowish-white, 

 with often a faint appearance of the outer rays : hinge 

 with a single cloven tooth in one valve and a hollow on 

 .f ach side ; in the other valve two teeth, one of which is 

 cloven : length an inch or more ; breadth above two. 



On the western coasts, and Dublin and Bantry bays* v. ?j, 



12. Solcn 



