Linn, names. 



4 pulchella 



5 elegans 



6 ochroleuca 



Engl, names. Synon. ^ Ref. 



orange-streaked M. Cab. 



beaked 



ochre -coloured 



Habitat. 



MACTRA. 



MACTRA. 



1 cyprinus brittle Br.Mus. 



2 recurva recurved 



3 Campechensis grooved 



4 tenera thin spotted 



5 similis rough coated 



6 subplicata wrinkle-skinned 



7 alata pale single-ridged 



8 Veneriformis Venus-shaped 



9 denticulata toothed 



10 subtriangulata truncated • 



11 ovata oval 



12 Taprobanensis smooth, angular 



Peru, 

 u. 

 Campeachy. 

 Van Dieman's L. 



Tranquebar. 

 u. 



Ceylon. 



DONAX. 



DONAX. 



1 Scalpellum slender Br.Mus. v- 



2 Stultorum mactra-shaped Indian Seas. 



