VENUS- 237 



V, the point of junction in which is near the hinge, and at 

 the end of each of the lines a red streak which continues 

 to the front margin : beaks prominent, pointed, turned a 

 little to one side; inside glossy white, with the margin 

 plain : length a quarter of an inch ; breadth rather more, 



The white lines are sometimes wanting j but the red 

 marks are always present. 



Dredged up at Falmouth ; very rare. v. m. 



11. Venus subcordata. Gauze Venus. 



Montagu, pi. 3. f. 1. 



Shell strong, roundish, rather convex, white, with strong- 

 longitudinal rib-like striae, and remote transverse ridges, 

 making the intermediate spaces each a long square : beaks x 

 nearer to one end, much incurved and turning to one side ; 

 the cartilage end almost straight and much sloping, the 

 other turned much inwards and almost smooth and glossy : 

 inside glossy- white, with the margin finely notched : teeth 

 very strong : diameter a quarter of an inch. 



Dredged up in Falmouth harbour : very rare. 



12. Venus Dysera. Reticulated Venus. 

 Lister, pi. 278. f. 115. 



Shell somewhat oval and heart-shaped, white, with se- 

 veral transverse rufous-brown lines on the cartilage slope 

 of one valve, marked with distant concentric raised ridges 

 reflecting upwards, the spaces between them strongly stri- 

 ate longitudinally ; inside white, with the margin slightly 

 notched : beaks small, turned much to one side ; in that 

 valve which is without the colored markings ot\ the slope, 

 the outer-^ooth next the beak is very minute : diameter 

 hardly three-quarters of an inch. 



Dredged in the Firth of Forth : very rare. 



13. Venus Guineensis. Guinea Venus. 

 Lister, pi. 306. f. 139. 



Shell convex, produced at one end, with numerous close- 

 set regular sharp concentric ridges, of a greyish -white color 

 with, two or three purplish-brown longitudinal rays ; inside 

 white, inclining to purple on the margin behind the hinge, 

 with the margin plain : beaks turning to one side, with a 



heart- 



