No. 50.] 31 



FAMILY AROACEA. 



CucTJLLiEA AURicuLiFERA, 2 sp. The Eared CucuUcsa, 



Aeca no-e. Noah's Ark. 



Arca torttjosa. The Twisted Ark. 



Arca indica, 2 sp. 



Arca . 



Arca . 



Arca . 



Pecttinculus . 



Pecttjnculus . 



FAMILY CHAMACEA. 



Chama LAZARUS, 2 sp. Lazarus^s Chama. 



Chama , 



Chama . 



FAMILY TEIDAONITES. 



Tridacna squamosa. 



Hippopus MACULATUs, 4 sp. The Spotted Hippopus. 



FAMILY MYTILACEA. 



Mytilus erosus, 7 sp. 



MoDIOLA TULIPA. 



Pinna squamosa. The Scaly Pinna. 

 Pinna nigrina. The Black Pinna. 

 Pinna . 



FAMILY MALLEACEA. 



Perna . 



Malleus albus. The Hammer Oyster. 



Meleageina MARGARiTiFERA. The Mothcr-of-pearl Oyster. 



FAMILY PECTINIDES. 

 Pecten pleuronectes. The Sole Scallop. 

 Pecten maximus. 

 Pecten . 



