CONCHYLIA— D/THF/?^. 26. 91 



one f the teeth is cloven, with one of the segments pointing to- 

 wards and nearly in a line with the cartilage ; and between the teeth 

 in each valve is a short white longitudinal rib. 



PsAMMOBiA testa ohlongd loevi, latere antico ah umbone declivo, dente declivia. 



altera concavo. 

 Shell oblong smooth, sloping from the beak on the anterior side, 



with one of the teeth concave. 

 Solen declivis. Turton, Conch. Diet. p. 164, fig. 80. 



Ohama angustior. Lister, Conch, tab. 421, fig. 265. 

 Mus. nost. From Scilly. 



Shell three quarters of an inch long, and two inches broad, thin, 

 white or covered with a dark brown skin, irregularly striate trans- 

 versely, rounded and nearly equal at both ends, sloping from the 

 hinge on the anterior side, and very slightly contracted in the middle : 

 beaks nearly central, small, pointed : in each valve two teeth, one of 

 them concave, and in one valve one of them oblique. 



PsAMMOBiA testa ohlongd reniformi, strtis transversis ad latera suhla- antiquata. 



mellatis, dentibus erectis. 

 Shell oblong kidney-form, with transverse striae which become a 



little laminar at the sides, and all the teeth erect. 

 Solen antiquatus. Pennant, iv. p. 174, tab. 49, fig. 4. 

 Montagu, Test. Brit. p. 52. 

 Linn. Trans, viii. p. 46. 

 Donovan, Brit. Shells, iv. tab. 114, 

 Turton, British Fauna, p. 148. 

 n2 



