BIVALVES — M ACTR A. 



35 



Scientific Name. Locality, Common Name. 



Solida Britain Strong Mactni • 



Solidissima North America Thick • • • • do ■ 



Truncata Britain Truncated • do ■ 



Subtruncata Britain Abrupt • • • • do ■ 



Austrahs New Zealand Southern • • do • 



Piperata Mouth of the Niger Pepper • • • • do 



Tenuis Britain Thin do • 



Boysii Ditto Boys' do • 



Division J I. — Shell ovate, oblong. 



Glauca • • • 

 Rugosa • • ■ 

 Egyptiaca 



Family 1 — Closed at both ends. 



• Spain and Britain Red rayed • do 



• Mediterranean, Nicobar- Rugged---'do 



• Red Sea Egyptian •> ■> do 



Family ^.—Gaphig at the anterior end. 



Pellucida Guinea Pelkicid • - do 



Fj'agihs Britain, Nicobar • • • Brittle • • • • do 



Listeri Britain Lister's- • • . do 



Family S.— Gaping at both ends. 



Planata Tranquebar, Britain 



Lutraria - • . Britain 



Hians Ditto 



Flattened • • do 



Muddy do 



Gaping" ■• do 



D'2 



