XV 



I Angulated Gryphcea. 2 Long-tpined Spondyltis. 3 Edible Ostrea 4 

 Plicatula. 5 Speckled Pecten. 6 TJiorny Plagiostoma. 7 G^toMj/ Ziwa. 8 Tur- 

 ton's Oai«omma. 9 Spondylw-shaped Pedum. 10 Pearl-bearing Meleagrina. 



II ^ngr^MA ^vicwto 12 FTitte Malleut. 13 <Sadc«e Perna. 14 Muscle-shaped 

 Crenatula. 16 ^u^^e i>inna. 16 Edible MytUus. 17 Discordant Modiola. 18 

 ^po««d Hippopus. 19 Ovai Btheria. 20 Lazarus Chama. 21 (?ian< Tridacna. 

 22 iVtfe /rtdina. 23 C>6itju« Pisidium. 



