1 89 I.] BAKER SHELLS FROM THE MAURITIUS. 33 



198. Natica (Mamilla) melanostoma, Gmelin. 



199. " " maura, Brug. 



200. Sigaretus planulatus, Reel. 



Family LAMELLARIIDiE. 



201. Lamellaria (Chelynotus) Berghi, Desh. A common 

 form. 



Family NERITIDiE. 



202. Nerita albicilla, Linn. Numerous specimens received. 



203. Nerita (Odontostoma) polita, Linn. The specimens 

 from the Mauritius are of a uniform gray, mottled with black, and do 

 not seem to vary to any extent. 



204. Neritina gagates, Lam. Quite a variable species and 

 one very common to the region. 



205. Neritina (Clithon) longispina, Recluz. 



206. " " " var. mauritiana, Morelet. 



The variety is often twice the size of the typical form and desti- 

 tute of spines, or at least with an occasional single spine on the 

 shoulder. Very common. 



207. Neritina (Alina) mauritii, Lesson. Quite well known 

 under the name of saiidwichiensis^ Desh., which is a synonym. Only 

 three specimens received. 



208. Septaria (Elara) suborbicularis, Sowb, 



Family NERITOPSID^. 



209. Neritopsis radula, Linn. Not uncommon. 



Family TURBINIDiE. 



210. Turbo petholatus, Linn. The specimens before me are 

 much darker than is usual with this species and are highly polished. 



211. Turbo Japonicus, Reeve. This shell was described as 

 from Japan, but Sowerby says it is from the Mauritius only. I have 

 never seen one from Japan but have seen numerous specimens from 

 the Island of Mauritius. 



212. Turbo argyrostomus, Linn. 



3, Proc. Roch. Acad, of Sc, Vol. 2, May, 1892. 



