1891.] MR. E. A. SMITH ON SHELLS FROM ADEN. 423 



Romer's figures 2e, 2 c?, and 2e do not, I think, represent young 

 specimens of iS. menst?'ualis, but in my opinion, at all events fie;. 2 e, 

 illustrate the adult state of a distinct species, specimens of which in 

 the British Museum from the island of Formosa hear the name of 

 5. cumingii, Hanley. This species has not been descrihed, but 

 appears in a list of Formosan shells published by Mr. Cuming in 

 the Proc. Zool. Soc. 1865, p. 196. It is remarkable for the radiating 

 character of its markings, its radiating stricB, and concentric periodic 

 bluish zones. The interior may be more or less violet, or vi^hite, or 

 flesh-tint, and the pallial sinus is something like that o'i S. menstru- 

 alis, but does not converge to so sharp a point. 



188. Cytherea (Tivela) ponderosa, Koch. 

 Sab. Zanzibar ; Aden {Garamagna). 



189. Cytherea (Callista) umbonella, Lamarck. 



Hah. Brazil ; Hed Sea (^Lamarck). 



A single valve was all that was obtained by Major Yerbury. It 

 is in perfectly fresh condition and of the same vinlet colour as the 

 specimen figured by Reeve (Conch. Icon. Dione, fig. 27). I have 

 never seen specimens from Brazil, but according to Romer it is 

 plentiful on the coast of that country. 



190. Cytherea (Callista) Florida, Lamarck, 



Hub. Red Sea, Persian Gulf, Mozambique, Madagascar, Sey- 

 chelles ; Aden {Caramagna). 



191. Cytherea (Caryatis) hebr^a, Lamarck. 



Hub. Philippine Islands and New South Wales. 

 For remarks upon this species see the Report upon the Lamelli- 

 branchiata of the 'Challenger' Expedition, pp. 138-9. 



192. Cytherea (Caryatis) yerburyi, nom. nov. 



Dione erubescens, Reeve (won Danker), Conch. Icon. pi. xi. fig. .54. 



Hab. Ceylon {Reeve) ; Queensland {Mr, Brazier's GolL) ; Japan 

 {MS. note in B.M.) 



I agree with Reeve in considering this species distinct from C. 

 crocea, Desh. ( = C. deshayesii, Pt'r.), the differences in shape and 

 sculpture, and colour also, being quite sufficient, in my opinion, 

 to warrant its specific separation. The name erubescens being pre- 

 occupied by Dunker for a species from West Africa, I have substi- 

 tuted that oi yerburyi. 



193. Circe corrugata (Chemnitz). 



Hah. Red Sea, Persian Gulf, Madagascar, New Holland ; Aden 

 {Caramagna). 



194. Circe intermedia, Reeve. 



Hab. Not previously recorded. 



Several specimens irom Aden prove the vahdity of this fine 



