NORTH BRITISH TESTA CEA. 38$ 



Venus. 



21. compressa. M. New species, not uncommon 



x on the shore of Dunbar j 



at othe< parts of the coast 

 ve y sparingly. 



22. cassina. M. New species, dredged in 



deep water, Frith of Forth, 

 veiy rare. 



23. granulata. M. D. Fiith of Forth, rare. 



CHAMA* 



Animal a Tethys. Shell bivalve, rather coarse. 

 Hinge with a callous gibbosity. Teeth oblique- 

 ly inserted into the opposite valve. Anterior 

 slope closed. 



1. Gor *. D. M. This exceeding rare shell in 



the British catalogue, was 

 taken by me alive in the 

 1 rith, near St Abb's Head, 

 since which, I picked up 

 part of a broken valve on 

 the shore of Icolmkill, 

 one of the Western Isles. 



ARCA. 



Animal a Tethys. Shell bivalve, e qui valve. 

 Hinge with numerous sharp teeth, alternately 

 inserted between each other. 



fuscsu ^ M. This shell appeared not un- 



Nose. 1 D. common on my first visit* 



* Tab. viii. fig. 7. 



