1891.] MR. E. A. SMITH ON SHELLS FROM ADEN. 419 



larger size, and the different tint of the columellar callus. There are 

 three specimens of this very interesting species in the Museum, two 

 presented by Mr. Bayuham and one by Major Yerbury. The specimen 

 in best condition exhibits a faint pinkish tint upon the upper part 

 of the spire. Most of the pale brownish or luteous colour is upon 

 the back of the shell, and seems to be divided up into zones bv a 

 subm: dian white band and a narrower one upon the aiijjie above. 

 The constriction of the whorls at the upper part forms a very dis- 

 tinct sutural margination. 



160. Strombus fusifokmis, Sowerby. 



Hab. Aden {Caramag?ia) ; N. Australia {Beeve) ; Red Sea and 

 Indian Ocean. 



161. Pterocera BRYONIA (Gmclin). 



Hab. Red Sea, Aden (Caramayna) ; Seychelles, Amirantes, 

 Madagascar, Mauritius, Bourbon, East Africa, Ceylon, Japan, &c. 



lfJ2. RosTELLARiA cuRviROSTRis, Lamarck. 



Hah. Red Sea, Persian Gulf; Aden (Caramaffna) ; Moluccas. 



163. Nerita polita, Linn. 



Hab. Berbera and Assab {Caramagna) ; Indian and Pacific 

 Oceans ; Aden {Cooke). 



164. Nerita albicilla, Linn. 



Hah. Aden {Caramagna) ; Red Sea, Indian and Pacific Oceans. 



165. Nerita quadricolor, Gmelin. 



Hab. Red Sea, Mozambique, Natal, Bombay, Java. 



166. Nerita longii, Recluz. 



Hab. Aden, Socotra, Bombay. 



N. arahica, Reeve, is, as stated by Martens, a synonym of tliis 

 species and not related to N. chamceleon, Linn., as supposed by Tryon. 



167. Turbo radiatus, Gmelin. 



Hab. Red Sea and Persian Gulf; Madagascar. 

 T. radiatus. Reeve (non Gmelin), = T. elegans, Philippi, is 

 altogether a very distinct species. 



168. Turbo (Marmorostoma) coronatus, Gmelin. 



Hab. Aden, Red Sea, Natal, Zanzibar, Cochin China, Moluccas, 

 Japan, &c. 



T. granulatus, Gmel., should, I think, be considered a variety of 

 this species. Theumbilication of some specimens and the imperforate 

 columella in others has yet to be accounted for. This difference 

 occurs in specimens otherwise precisely similar. 



