x\^ 



I Angulated Grypho'a. 2 Long-spined Spondylus. .. jiu.i/tt Ostrea. 4 Branched 

 Piicatukt. 5 Speckled Pectm. 6 Thorny Plagiostoma. 7 Glassy Lima. 8 Tur- 

 ton's Gakomma. 9 Spondylus-shaped Pedum. 10 Pearl-bearing Meleagrina. 



II J^ng-ZwA ^mcM/a 12 White Malleus. 13 ^faddfe />erM.a. 14 Muscle-shaped 

 Crenatula. 15 ^uire Pinna. 16 ^didfe MytUus. 17 Discordant Modiola. 18 

 Spotted Hippopus. 19 Ot>a^ Etheria. 20 Lazarus Chama. 21 G^tan/ Tridacna. 

 22 iS^tfe Iridina. 23 06/tjM« Pisidium. 



