1891. J MR. E. A. SMITH ON SHELLS FROM ADEN. 429 



Voyage,' 1839. This seems, therefore, to prove that the work in 

 question was not completed until after that date. 



228. SiLTQUA JAPONiCA, Dunker. 



Aulus japonicus, Dunker, Proc. Zool. Soc. 1861, p. 426. 



Cultellus , Sowerby, Conch. Icon. pi. v. f. 15 6 (non 15 a). 



Machcera japonica, Clessin, Conch. -Cab. p. 63, pi. 18. f. 5. 



Hab. Japan. 



The shell figured by Sowerby (fig. 15 a) is in the Cumingian 

 collection labelled '-^ pulchra, Gould," and not " pulchra, Dunker," 

 as stated in his synonymy. It seems to me different from S. japonica, 

 for although the colouring is very similar in both species, S. pulchra 

 has the umbones more excentric and has not the keel-like ridge 

 which defines the dorsal area in S. japonica. " S. pulchra, Gould," 

 is given in Conrad's Catalogue of Solenidae ^ without any reference, 

 nor have I been able to discover where it was described. 



229. TuGONiA NOBiLis, A. Adams. 



Hab. Assab, Kamaran {Garamagna). 



This species is very like the West-African T. anatina, and seems 

 distinguished merely by the absence of radiating striae anteriorly. 

 It is very variable in form, some specimens being much more globular 

 than others. ""West Africa," assigned to this species in the 

 ' Conchologia Iconica,' may not be incorrect, although we scarcely 

 expect to find the same species at Senegal and Aden. 



T. semisulcata, A. Ad., I regard as the young of this species, 

 and T. siphonata, Reeve, and T. compressa, Reeve, are likewise 

 young specimens of T. anatina, Gmelin. 



230. Venericordia antiquata (Linn.). 

 Hab. Ceylon. 



231. Venericordia cumingii, Deshayes. 



Hab. Borneo. 



This species, described in the Proc. Zool. Soc. 1852 (p. 102, pi, 17. 

 f. 15), is not so pointed posteriorly as the preceding. In other 

 respects it is very similar, and it is probable that the two forms 

 pass one into the other. V. canaliculata, Reeve, appears to be 

 another form of the same species. 



232. Cardita (Beguina) gubernaculum, Reeve. 

 Hab. Zanzibar, Madagascar. 



233. Lucina (Codakia) exasperata, Reeve. 



Hab. Honduras (Reeve). New Caledonia, N. Australia, Ami- 

 rantes Islands, and Red Sea {Brit. Mus.). 



The Caribbean locality has not yet been confirmed, but it is quite 

 possible it may be correct, for another well-known species of this 



^ Amer. Journ. Conch. toI. iii., Appendix, p. 23. 

 Proc. Zool. Soc— 1891, No. XXIX. 29 



