430 MR. E. A. SMTTH ON SHELLS FROM ADEN. [JunC 16, 



genus, L. tigrina, as pointed out by Cooke ', is also found both in 

 the West Indies and in the Indian Ocean. 



234. CoRBULA TAHEiTENsis, LaiTiarck. 



Hah. Tahiti ; New Guinea {Brit. Mus.) ; Philippine Islands 

 (Reeve, Conch. Icon. sp. 15). 



235. Galeomma, sp. 



A single valve obtained by Major Yerbury is very like G.formosa, 

 Deshayes, but rather more glossy and of a bright yellow colour. 



236. Diplodonta rotundata, Turton. 



The three specimens from Aden appear to me inseparable from 

 this European species. It is quoted by Caramagna from Zeila and 

 Berbera. 



237. Martesia striata (Linn.). 



Hab. " England, West Indies, Philippines '" (Tryon) ; Arafura 

 Sea (' Challenger ' ). 



238. Mytilxjs pictus, Born. 



Hal. N.W. Africa to the Cape of Good Hope. Aden {Cara- 

 magna). 



The range of this species { = M. afer, Gmelin) is about the same 

 as that of M. perna, Linn., and I am inclined to beheve that both 

 forms belong to one and the same species. The three specimens 

 from Aden, although not typical examples, evidently belong to this 

 species. Three shells in the Cumingian collection labelled " tapro- 

 banensis, Blanf. MSS., Galle, Ceylon," apparently belong to this 

 species also. 



239. Mytilus senegalensis, Lamarck. 



Hah. Senegal {Lamarck) ; S. Africa {Krauss) ; Red Sea {Brit. 

 Mus.); Aden {Caramagna under M. variabilis, Krauss). 



240. Modiola auriculata, Krauss, var. ? 



Hab. S. and E. Africa ; Gulf of Suez. 



Two specimens, one of a bright red or almost scarlet colour, the 

 other of the normal tint, are probably half-grown specimens of this 

 species, differing from the typical form in having the dorsal angle 

 more central and no emargination or sinus in front of it. 



241. Septifer Excisus, Wiegmann. 



Hab. Madagascar, Mauritius, Mozambique, Mergui. 



242. A RCA NAVicuLARis, Bruguicrc. 



Hab. Suez, China, Amboina, N. and N.E. Australia, Solomon Is. 

 Two dead valves are all that were obtained. 



' Ann. & Mag. N. H. 188fi, toI. XTiii. p. 99. 



