36 



FAMILY 5. BULL^EID^E. 

 GENU&. BULL^EA. Lamarck, 1601, 

 1 B. aperta. Lamarck. Britain. 



FAMILY 7. APLYSfflXffl. 

 GENUS. DOLABELLA. Lamarck, ISOJ. 

 1 D. Rumphii. Cuvier. Indian Ocean. 



GENUS. APLYSIA. Linnaus, 1767. 

 1 A. ocellata. Reeve ? Philippine Islands. 



FAMILY 8. PLEUROBRANCHID^E 

 TEIBE 1 . PLEUROBR ANCHIN^. 

 GENUS. PLEUROBRANCHUS. Cuvier, 1805. 

 1 P. membranaceus. Moutfort. Britain. 



TRIBE 2.-UMBRELLIKE. 

 GENUS. UMBRELLA. Lamarck, 1812. 



1 U. Cumingii. Reeve. Sandwich Islands. 



2 U. Indica. Lamarck. Eastern Seas. SirW.Denison. 



3RD SUB-CLASS. PULMON ATA. Cuvier, 1817. 



ORDER l.-INOPERCULATA, Gray, 1850. 



SUB-OKDER 1. GEOPHILA. 



FAMILY 1. HELICID^B. 

 GENUS. HELIX. Liwusus, 1758. 



