382 



Mr. A. H. Cooke on the 



Japan, and eastward as far as the Sandwlcli Islands. There 

 are, as is well known, special reasons which tend to make the 

 marine fauna of the Pliili[)pines better known to us than that 

 of, e.g., the Seychelles or the Maldives ; and possibly it is only 

 because we have more detailed information as to the species 

 of Mollusca resident at the former locality that we at present 

 prefer it to the latter, as indicating a radiating point of distri- 

 bution. 



The annexed table, compiled from the latest sources of 

 information, is an attempt roughly to indicate the geographical 

 distribution of the Mollusca of Suez. The two localities 

 about which I feel dissatisfaction, being sure that the figures 

 given do not indicate their real relation to the Suez shells, 

 are Natal and E. Australia. For the former Krauss's ' Siid- 

 afrikanischenMollusken' (1848) was my only authority; while 

 the latter, north of Moreton Bay, is a region practically un- 

 explored, but whose tropical climate and comparative nearness 

 to the Philippines assure it a much closer relation to them 

 than the figures given would seem to imply. 



The Gasteropoda alone have been worked out, as the infor- 

 mation with regard to the Lamellibranchiata was often so 

 scanty as to lead to practically no result. 



The 55 Suez Gasteropoda common to Japan are : — 



Pteroceras bryouia, Gmel. 

 Terebellum subulatum, Lam. 

 Urosalpinx contractus, Reeve. 

 Fasciolaria trapezium, L. 

 Cantbarus rubiginosus, Reeve. 

 Nassa gemmulata, Lam. 

 Oolumbella flavida, Lam. 

 Acus subulata, L. 

 Ricinula riciuus, L. 



Rapana bulbosa, Sol. 

 Coralliopbila madreporarum, Soio. 

 Rauella bians, Schum. 

 Triton tritonis, L. 



pilearis, Lam. 



Cassis vibex, L. 

 Mitra pretiosa, Reeve. 



obeliscus, Reeve. 



Cypraea fimbriata, Omel. 



