366 



SHELLS AND SHELL-FISH. 



Lepton Turton. Small, nearly round ; umbones cen- 

 tral ; teeth ? The cardiform type. 



L. squamosus. Sow. Man. f. 62. 



SoLENOcuRTis. Shell depressed, thin, transverse, oblong 

 ovate ; the valves slightly gaping at one extremity ; 

 cardinal teeth and umbones nearly central. 



Solenella Sow. Oval, compressed ; epidermis glossy ; 

 hinge margin nearly straight; cardinal teeth wanting ; 

 posterior lateral teeth numerous, sharp ; anterior end 

 somewhat truncated : representing Nucula. 

 S. Norisii. Sow. Man. f. 138. 



Solenocurtis Blainv. Oblong-ovate, nearly linear; 

 umbones small, nearly central, with a thickened in- 

 ternal transverse ridge; ligamental margin much 

 thickened, (fig. Il6. e.) 

 S. radiata. Sow. Man. f. 61. Blainv. Man. pi. 80. f. 1. 



Sanguinolaria Lam. Ovate, compressed ; posterior 

 end sub~rostrated ; anterior rounded ; cardinal teeth 

 small, f . {fig. 11 6. d.) 



S. rosea. Sow. Man. f. 98. 



Glauconome Gray.* Obovate, not gaping, sub-ventri- 

 cose, and rounded anteriorly, narrowed and com- 

 pressed posteriorly ; cardinal teeth 4, some of which 

 are bifid ; ligament oblong ; external epidermis ex- 

 tending over the margin ; fluviatile : apparently re- 

 presenting Mactra in this genus, 



G. chinensis Gray. Sow. Man. f. 64. 



Solenymia Lam. Shape of Solenocurtis, but some- 

 what cylindrical ; umbones very small, and placed 

 laterally ; hinge margin straight ; valves gaping on 

 their anterior end ; cardinal teeth i, dilated and 

 compressed, with a callous ridge between ; ligament 



* I have not seen this shell, which, from the figure quoted, has exactly 

 the shape of Unio ovata. 



