1.30 CONCHYLW— D J THYB A. US. 



Venus subrhomboidea. Montagu, Suppl. p. 49, tab. 28, fig. 2. 



Pennant, Br^t. Zool. iv. p. 211. 



Tnrton, Conch. Diet. p. 246. 

 Found by Captain Laskey, in the Firth of Forth. 



Shell half an inch long, and three quarters broad, rounded 

 at one end and truncate at the other, irregularly wrinkled trans- 

 versely, and crossed by fine longitudinal lines: color white, with 

 a rufous tinge at the truncated side : beaks small, nearly central : 

 hinge with two strong plaia teeth, iu eaci^ valve, one of them very 

 oblique. 



Montagu lyas of decided opinion tbat this shell is very distii;ict 

 frpni any of the varieties of the Petricola Irus, both fronpi. the 

 circumstances of the teeth being quite plain, and of the traqsverse 

 striae being more obtuse and ijo^ so laminar. Whether it be an 

 inhabitant of rocks we are unacquainted. It is at preseQ,t a very 

 obscure species. 



Scotica. Ci^A,ssii4A test4i cordato-orbicuj^ri subcompressd, cost^ tr,ans- 

 , vet'sis parallelis roiundatis, umbonibus promimnlibus.. 

 Shell round heart-shaped, rather flat, with transv^rs^ parallel 

 rounded ribs, and the beaks prominent. 



Tab.nost. 11, fig. 3, 4. 

 Venus Scotia. Montagu, T^sf^ Brit. Suppl. p. 44. 



Linn. Trans, viii. p. 81, tab. 2, fig. 3. 

 Turion, British Fauna, p. 159. 

 Pennant, Brit. Zool. iv. p. 204. 



