244 VENUS. 



the Roll of Battle Abbey, the ancestor of this very respect- 

 able naturalist is denominated "De monte acute/' forming 

 by a natural ellipsis Montacutus, corruptly anglicized into 

 Montagu. With this chain of thought we have, in our Bri- 

 tish Fauna, exchanged the name of C.yclopterus Montagui, 

 as given by Mr. Donovan, into C. Montacuti. And Mr. Mon- 

 tagu has himself admitted the principle, by calling his shell 

 Venus Danmonia, and not V. Devonia. 

 On the Dunbar coast : very rare. 



C. Oval, and mostly angular on the cartilage side, 

 26 to 35. 



26. Venus decussata. Parr Venus. 



Lister, pi. 423. f. 271 Pennant, pi. 60, middle fig. 

 Da Costa, pi. 1 4. f. 4 Donovan, pi. 67 Linn. Trans, vi. 

 pi. 17. f. 1 1, 12, and viii. pi. 2. f. 6 Dorset Cat. pi. 6. f. 4. 



Shell strong, convex, much produced at the cartilage end, 

 where it is somewhat angular and as if 1 cut off, irregularly 

 striate longitudinally, and crossed by transverse lines, which 

 are stronger towards the sides; especially the angular one, 

 where it puts on a coarse wart-like appearance : color rusty- 

 brDwn, with sometimes two or three dark longitudinal rays 

 and a few blotches or zigzag marks ; inside smooth, white, 

 with often a yellow or reddish tinge, and purple about the 

 cartilage side, the margin plain and very obtuse : beaks a 

 little turned to one side, not quite central, with the heart- 

 shaped depression under them obsolete or wanting : teeth 

 three in each valve, close together, two of them cloven : 

 length nearly two inches ; breadth nearly three. 



On most sandy coasts, v . v. 



27. Venus Pullastra. Hen Venus. 



Linn. Trans, vi. pi. I/, f. 13, 14, and viii. pi. 2. f.7 

 Dorset Cat.pl. 1. f. 8. 



Shell convex, produced and somewhat angular on the 

 cartilage side, finely and closely striate longitudinally and 

 transversely, but not running into coarse tubercular pro- 

 jections at the cartilage side : color varying from clear 

 white to a yellowish or brownish shade, with grey rufous 

 or rich purple zigzag lines, streaks, rays or blotches, which 



are 



