.Mr. 1!. ParHtt on n neir Fossil Halamis. 



211 



articular ridijt' lari^r, blunt, aii<l t-iirvod towards tlio scuti'llar 

 inarLciu, loaviiii,' a hxri^c articular furrow. vSjmr none; basal 

 uuiri^in nearly straiijiit ; in tlu- place of the spur there is a 

 slig:lit curve and a faint trianj^ular depression. Carinal 

 vih^e very broad and thick, longitudinally striated ; the 

 inner ed<]re slicrhtlv reflected. 



The outside of both scutum and terguni, in the full-grown 

 specimens, is neaidy or (^uite smooth ; but in the young or 

 about half-grown specimens it is transversely striated, the 

 strije not very deej), and consequently the ridges between 

 them not very prominent. 



This is a fossil species, and is found in considerable num- 

 bers, in some places almost covering the lioor of a raised beach 

 between Saunton and Baggy Point, on the shore of North 

 Devon. It was first pointed out by the Rev. D.Williams in a 

 letter in the Geological Society's ' Transactions,' 1837, vol. v. 

 ser. 2, in reply to an article by Prof. Sedgwick and Sir K. 

 Murchison, in the same volume, on the raised beaches ; but 

 this gentleman did not distinguish the species, and, curiously 

 enough, the learned Professor and Sir Roderick did not notice 

 it. As they form an important feature in this deposit, and 

 more ])articularly as they are in sifu, these BaJani are of vast 

 imjjortance in discussing these raised beaches. These Balani 

 were killed on the spot they now occupy either by being sud- 



K T 



Baloiius saioiionentiis. 



Fig. I. Shell entire. 



Fig. IT. Portion of ba?e of shell. 



Figs. Ill it lY. .Scutum and tergum, inside vIpw. 



Fig. Y. Part of young scutum, outside. 



denly lifted up above the action of the waves, or by being 

 suddenly covered with sand. The reason that I assert this is, 



15* 



