129 



rarely of a fine blufh-colour, with two or three white, 

 longitudinal ftreaks : umbo placed much to one fide, be- 

 neath which is a lanceolate, cordiform depreffion ; hinge 

 with three teeth in each valve, the outer ones a little di- 

 verging, middle one bifid. Infide white, frequently tinged 

 with blufii-colour; margin plain; edge obtufe; cicatrix 

 nearly cylindric, running from the anterior fide, not quite 

 half way acrofs towards the oppofite end.- 



This fpecies is not fo common as the decujfata, but is 

 fometimes taken in the fame places. We have found it 

 in fome parts of Corn-wall^ and rarely in DevonJJiire and 

 DorfetJIiire. 



Thofe from Giiernfey are extremely beautiful. 



19. 

 Venus aurea. GmeJ. Syfl. p.32SS.98. — Turt. Lin. iv.p.236. Aurea. 



LijlerConch. tA0iJ.249.—Petiv.Gaz. 94. S ? 



C/'u'iu. Conch, vii. t. 43; f. 453. 

 Venus nebulofa. Fult. Cut. Dorfct. p. 34. 

 Venus rhoinboides. Br. Zool. No. 55 ? — Turt. Lin. iv. p.2 11?' 



V. with a fub-cordated, moderately ftrong fhell, round- 

 ed at both ends like the laft, but not fo broad in propor- 

 tion to its length ; flriated tranfverfely, and marked with 

 very faint longitudinal ftri^, fcarcely difcernable without a 

 glafs : umbo placed near to one end, fmall, pointed, turned 

 to one fide; beneath v/hich is a lanceolate, cordiform d;:;- 

 prelTion: colour various, fometimes white, elegantly 



S marked 



