MOLLUSCA. 503 



70. Strombus gibberulus, Linne. 

 Seychelles, 4-1 2 fms.; He des Roches, Amirantes; and Mozambique. 



77. Strombus floridus, Lamarck. 

 African Island and Darros Island, on the shore. 



78. Strombus columba, Lamarck. 

 Poivre Island, Amirantes. 



79. Pterocera aurautia, Lamarck. 



Providence Island, Mascarenes. 



80. Calyptrasa cicatricosa. 

 Reeve, Conch. Icon. figs. 3 a, 3 b. 



Providence Eeef, Mascarenes ; Philippines {Cuming). 



81. Nerita plexa, Chemnitz. 



Eagle Island, Amirantes. 



A specimen from this locality is of unusually large size, having 

 an extreme diameter of 56 millim. 



82. Nerita plicata, Chemnitz. 

 Eagle Island and He des Roches, Amirantes. 



83. Nerita polita, LinnS. 



He des Roches. 



84. Nerita albicilla, Linne. 

 Poivre and Darros Islands, Amirantes. 



85. Neritina (Smaragdia) rangiana, Recluz. 

 Providence Reef, Mascarenes. 



86. Turbo histrio. 



Reeve, Conch. Icon. vol. iv. 6g. 32 ; Rhilippi, Conch.-Cab. p. 78, pi. 18 

 fig. 6 ; fKiener, Cog. Viv. pi. 33. fig. 3. 



African and Darros Islands. 



The locality of this species has not, I believe, been previously 

 recorded. The type is a white shell broadly rayed above with a 



