Linn, names, 



3 Madagasca- 



riensis 



4 biradiata 



5 sexradiata 



Engl, names. 

 ribbon 



two-rayed 

 six-rayed 



Sijnon. ^ Ref. Habitat. 

 M. Cab. Madagascar. 



Isle of France. 



VENUS. 



1 lamellata 



2 Berrii 



3 elegans 



4 Stutchburii 



5 similis 



6 subrugosa 



7 subrostrata 



8 papyracea 



9 Kingii 



10 aphrodinoides 



11 hians 



12 aurisiaca 



13 Childreni 



14 cyprinoides 



15 costulata 



VENUS. 



rough, ridged Br.Mus. 



Capixchin 



cockle-shaped 



Stutchbury's 



spotted 



roughish M. Cab. 



slightly beaked Br.Mus. 



Paper 



King's 



grated 



gaping 



golden-valved 



Children's 



strong marked 



mottle ribbed M. Cab. 



New Holland. 



u. 



Brazil. 



Sandwich Isl. 



China. 



Panama. 



New Holland. 



S. Seas. 



China. 



Japan. 

 S. Seas. 



