426 



VENERIS. 



impar, Lam. 

 indecora, Phil. 

 iuflata, Sow. 

 innoceus, Sow. 

 Kingii, Gray. 

 loeta, Linn. 

 Lamarckii, Gray. 

 lilaciua, Lam. 

 limatula, Sow. 

 lupanaria, Less. 

 maculata, Linn. 

 Manillas, Sow. 

 minuta, Koch. 

 modes ta, Sow. 

 multiradiata, Souk 

 multispinosa, Sow. 

 nmltistriata, Sow. 

 nobilis, Reeve. 

 obesa, Sow. 

 obliquata, Wood. 

 pallescens, Sow. 

 pannosa, Sow. 

 pellucida, Lam. 

 phasianella, Desh. 

 Pkilippii, Desh. 



piperita, Sow. 

 planatella, Lam. 

 pudica, Mke. 

 pura, Desh. 

 purpurata, Lam. 

 rosea, Brod. and Sow. 

 rostrata, Koch. 

 rudis, Poli. 

 rufescens, Desh. 

 rutila, Sow. 

 simplex, Sow. 

 sphericula, Desh. 

 squalida, Sow. 

 subinflata, Soiv. 

 subpellucida, Sow. 

 suppositrix, Mke. 

 tellinasforaiis, Phil. 

 tessellata, Homb. and Jacq. 

 tortuosa, Brod. 

 tumens, Gmel. 

 unibonella, Lam. 

 unicolor, Sow. 

 varians, Wood. 

 virgo, Gray. 

 vulnerata, Brod. 



Genus TIVELA, Link. 



Shell triangular, cuneiform, sub -equilateral, inferiorly 

 acute ; margins of the valves entire. Hinge 3-5 den- 

 tate in one valve, 4-6 dentate in the other ; anterior 

 lateral tooth narrow, elongated, compressed. Pallial impres- 

 sion posteriorly sinuated; sinus short, oblique, or somewhat 

 horizontal. 



Syn. Trigona, Muhlfehlt. Trigonella, Conr., not Da 

 Costa or Llhwyd. "Le Tivel," Adanson. 



