56 CONCHOLOGY. 



V. rimularis. V. undulosa. 



V. vulvina, • V. pumila. 

 V. vermiculosa. V. ovata. 



v. subrostrata. V. inquinata. 



V. Casina. The Casina, or bvoad-ribbed Venus. PI. 8, 

 fig. 2. 



Sub-orbicular, with transversely acute recurved ridges ; 

 lamellar striae ; crenulated on the hind margin ; slightly 

 channelled behind the depression. 



V. decussata. The intersected Venus. PI. 9, fig. 3. 



Species sub-rhomboidal, with decussated striae ; margin 

 not denticulated ; umbo placed near one end ; the three teeth 

 of the hinge very contiguous and very weak ; exterior brown- 

 ish and marked with purple lines. 



V. aurea. The golden Venus. 



Sub-orbicular, inequilateral, transversely and concentri- 

 cally striated ; yellow golden colour. 



V. corbis. The basket Venus. 



Species sub-rhomboidal, deeply latticed ; teeth very thick, 

 ligament entirely concealed, margin dentated. 



V. puerpera. The convex or spotted Venus. 



Species thick, solid, orbicular or sub-orbicular, with con- 

 centric striae, or, rather, laminae ; teeth very thick ; margin 

 dentated. 



V. granulata. The granulated Venus. 

 Species thick, solid, cardium-shaped, radiated from the 

 summit to the base. 



7. Venericardia. One species. 



This genus resembles the Venus, but has only two ob- 

 lique cardinal teeth on each valve. 



Shell equivalve, inequilateral, sub-orbicular, sides gener- 

 ally with longitudinal rayed ribs ; hinge with two oblique 

 cardinal teeth in each valve, turned in the same direction. 



