236 VENUS. 



morn a are the same shell : and upon recurring to the de- 

 scription of each in Montagu, we can perceive no essential 

 difference In his account of the V. Danmonia, he has con- 

 trasted it with the V. Scotica only, having probably forgot- 

 ten his previous description of V. sulcata, which appears to 

 have been drawn up from a specimen out of Mr. Sowerby's 

 cabinet. Montagu describes the V. sulcata as having con- 

 Centric ridges, the furrows between which are broader than 

 the elevated parts : Maton and Rackett represent it as 

 smooth, with obsolete wrinkles ; a character applicable to 

 the V. compi'essa of Montagu, our V. Montacuti ; their 

 figure also represents a sh ell of a much more triangular form, 

 with the beaks more elongated, than any of the numerous 

 Specimens which we have examined ; and being depicted 

 with the margin quite plain, is a tolerably good figure of 

 the V. Scotica. 



The present specific name we have adopted, not only as 

 being more characteristic and its primary denomination, but 

 as the name Danmonia would lead to the opinion that it 

 was peculiar to the coast of Devonshire. 



North of Scotland ; Bray, and the sandy coves near the 

 Giant's Causeway, in Ireland ; and the Devonshire coasts. 

 i\ v. 



9. Venus Scotica. Scotch Venus. 

 Linn. Trans, viii. pi. 2. f. 3. 



Shell roundish, rather flattened, covered with a pale yel- 

 lowish-brown or olive-green skin, under which it is white, 

 shaped and marked in every respect like the last, from 

 which it can only be distinguished by the inside margin 

 which is quite plain, and has a small rib or kind of rim round 

 it close to the edge. The specimens which we have col- 

 lected on the coasts of Devonshire, are very little more than 

 half the size of the V. sulcata of the same coast. 



Devonshire and Scotch coasts : rare. v. v. 



10. Venus minima. Minute Venus. 

 Montagu, pi. 3. f. 3. 



Shell thick, strong, roundish, rather flat, glossy, flesh- 

 color, with broad concentric ridges, and mostly two white 

 lines diverging half way downwards, and forming the letter 



