SOLEN. 135 



DOUBLE-RAYED RAZOR. 

 PL 33, /. 1. Mrs. Mawe. 



26. Solen biradiata. S. testa ovali, cequivalvi, utrinque hiante ; cardine 



utroque bidentato. 

 Shell oval, of equal valves, and gaping at both ends ; hinge with two 



teeth in each valve. 



This species is of a dull purple colour, mixed with 

 brown, and has two white rays passing obliquely from 

 the apex to the margin. It is, when recent, covered 

 with a strong green epidermis, the remains of which 

 are seen on the margin of the figure. The inside, in 

 young specimens, is nearly white, but, in fall-grown 

 shells, excepting the muscular depressions, it is orange- 

 coloured. The shell is open at both ends, and has two 

 bifid teeth in each valve. 



VARIABLE RAZOR. 

 PL 33. /. 2, 3. Mrs. Mawe. 



27. Solen vespertinus. S. testa ovali-oblonga, spadiceo-radiata ; cardinis 



sinistra valvce dente solitario, duplici alterius inserto. Linn. Gmtl. 



p. 3228. 

 Shell oblong-oval, with carnation rays; hinge with a single tooth in 



one valve, inserted between two other teeth in the opposite valve. 

 Born Mus. Test. pi. 2. f. 6, 7. Penn. Brit. Zool. ed. 1812. v. 4. pi. 50. 



f. 2. Chem. Conch. 6. pi. 7. f. 59, 60. Encycl. Method, pi. 228. f. 2. 



Pult. in Hutch. Dorset, p. 29. pi. 5. f. 1. Donov. Brit. Shells, pi. 



41. f. 2. Montagu Test. Brit. p. 54. Linn. Trans. 8. p. 47. 



An oblong-oval shell, striated concentrically, rounded 

 at one end, and somewhat truncated at the other ; it is 

 of a pale straw colour, with carnation rays, diverging 

 from the umbo to all parts of the shell ; gapes more 

 before than behind. The inside is yellowish white and 



