THE MOLLUSCA OF TORRES STRAITS. 163 



81. Purpura (Stramoxita) rustica, Lam. 

 Station 13, Murray Island. 



82. Purpura (Cronia) amygdala, Kiener. 

 Station 13, Murray Island; Station 8, Albany Pass. 



83. Sistrfm arachnoides. Lam. 

 Station 2, Warrior Island. 



84. Sistrum cayernosum, Bve. 



Station 13, Mer ; Station 5, Boydong Cays. 



85. Sistrum chrtsostomum, Desh. 

 Station 2, "Warrior Island. 



86. Sistrum concatenatum, Lam. 

 Station 13, Murray Island. 



87. Sistrum elatum, Blainv. 

 Station 5, Boydong Cays. 



88. Sistrum fiscellum, Chemn. 

 Station 5, Boydong Cays. 



89. Sistrum heptago]S"ale, Bve. 

 Station 5, Boydong Cays. 



90. Sistrum margariticolum, Brod. 



Originally described by Broderip as a Murex from Lord 

 Hood's Island, this has been found, in its typical form, generally 

 distributed throughout the eastern tropical area, occurring as 

 far nortb as the coasts of Baluchistan (Toionsend). 



91. Sistrum ochrostoma, Blainv. 

 Station 2, "Warrior Island. 



Tritonidje. 



92. Aquillus (Simpulum) gemmatus, Bve. 

 Station 13, Murray Island. 



93. AquijjLus (Simpulum) pilearis, L. 



94. Epidromus antiquatus, Hinds. 



95. Epidromus Bednalli, Brazier. 



Varying in size, but not in sculpture, our largest specimen 

 being long. 11, lat. 5 mm. 



96. Gtrineum (Lampas) ranelloides, Bve. 

 Station 13, Murray Island. 



