784 MESSR8. MELVILL AND STANDEN OX [Nov. 13, 



will therefore almost certainly tend to the advantage and pro- 

 portionate gain of the Noith Arabian >Sea and Pei'sian Gnlf. 



Numerical comparison tvith Adenese Mollusca. 



Commander E. R. Shopland has within the last four and a half 

 years published a second edition of his invaluable Catalogue of 

 Aden Shells* — all, to quote from his preface, "collected within 

 a radius of six miles from Steamer Point, chiefly on the shores 

 of the Inner Harbour, and fi-om the coral brought in from Little 

 Aden for washing lime." 



The list, as foreshadowed by one of us in a paper f giving 

 descriptions of new Mollusca from this locality, and likewise 

 giving a bi'ief historic resume of the Erythraean fauna, and its 

 bibliography, has now been augmented to, roundly speaking, 

 750 species. Of these, about 310 seem common to Aden and the 

 Gulf of Oman. It is not now feasible, owing to exigencies of 

 space, to give a list of these in detail, but the following are 

 enumerated as being of special interest. 



Murex rota Sotcb. (=anatomicus, 



Ferry, 1811, iiom. pvias.). 

 Pleurotoma baynhami Sm. 



catena Beeve. 



cecclii Jouss. 



■ pouloensis Jouss. 



■ • variabilis Sm. 



BuUia tabitensis Gmel. 



Cj'lleiie grayi Reeve. 



Nassa iiiarratii Sm. 



■ obockensis Jouss. (=zailensis 



Soivh.). 

 Mitra bovei Klen. 



coeligeiia Reeve. 



carnicolor Reeve. 



■ • tissurata LamJf. 



■ pretiosa Reeve. 



■ sboplandi Melv. 



Marginella mazagoiiica Melv. 

 Columbella propinquans Sm. 

 Scalaria deciissataifOHl'. (=kieueri 



T. Can.). 

 Terebra iiassoides Hinds. 



pellyi Sm. 



Elusa bnunieomaculata Melv. 

 Eulima sboplandi Melv. 

 Solarium regium Uanley. 

 Conus clytospira M. 4-" St. 



tlioniasi Soivb. 



■ traversiaiius Sm. 



Strombus beluchieusis Melv. 



■ fusiformis Soicb. 



Rostellaria curta Soivh. (=curviros- 



tris Laml-., 3). 

 Cypra;a leiitigincsa Gray. 

 Caiicellavia bystrix Reeve. 



Ceritbiura clypeouiorus Jouss. 



yerbixryi Sm. 



Rissoiiia pacbystoma Melv. 



seguenziaua Issel. 



Onoba delicata RMl. 

 Tuvritella maculata Reeve. 

 CaljqjtraBa edgariana Melv. 

 Vanikoro cancellata Chemn. 

 Leptotbyra lajta Montr. 



pilula Dimker. 



Etbalia carneolata Melv. 

 Calliostoma scobinatum^tl.^tif?. (formerly 

 considered endemic at Bombay). 



Thracia adenensis Melv. 

 Mactra fauroti Jouss. 

 Raeta abercrombiei Melv. 

 Psammobia elegans Desk. 



■ occideiis Cl/cmn. 



Telbna kolal.)a'.ia JFelv. 



metlioria Melv. 



' micans Uanley. 



pharaonis Uanley. 



Donax erytbrieus Berth. 



scalpellnm Gray. 



Cumingia occatilla 3felv. 

 Tivela ponderosa Koch. 

 Sunetta contempta Sm. 

 Petricola benipricliii Issel. 

 Crenella cumingiana Dunher. 

 Septit'er excisus Wiegm. 

 Cuculla?a concamerata Chemn. 

 Pectunculina mnltistriata ForsJc. 

 Pecten layardi Reeve. 



luculentus Reeve. 



townsendi Sowb. 



* Proc. Mai. Soc. vol. v. part 2, pp. 177-179 (July 1902). Tbe first edition was 

 published in Journ. Bombay Soc. x. pp. 217-235, with addendum, t. c. pp. 503-504. 



f Ann. & Mag. Nat. Hist. ser. 7, vol. iv. pp. 461-463 ; also op. cit. vol. vii. 

 pp. 550-556. 



