1891.] MR. E. A. SMITH ON SHEL.T.S FROM ADEN. 421 



central areas. The dirty green spotting is also more noticeable 

 on the hinder edges of the valves than elsewhere. 



179. Chiton (Callistochiton) adenensis. (Plate XXXIII. 

 fig. 7.) 



Testa parva, depressa,hau(lcarinata, concolor, pallide fuscescens ; 

 ■valva antica costis radiantibus circiter 22 granulatis instructa ; 

 arece luterales e radiis c/uobus forte c/ranulatis constitce, cen- 

 trales longitudinaliter granulose iiratce, lifts in medio tenuioribus 

 quam lateralibus, postica firis tenuibus ad 2.t granulatis in- 

 structa ; ligamenlmn pallide fuscescens, minutissime squamu- 

 latum, 



Longit. 14 millim., diam. 9g. 



The sculpture of this species is of the same character as that of 

 C. antiquus, Keeve, but not quite so pronounced, and the rays of both 

 the terminal valves are more numen us. 



180. Bulla ampulla, Linn. 



Hab. Indian and Pacific Oceans, Red Sea ; Aden {Oaramngna Sf 

 Jousseaume) . 



181. Haminea constricta, a. Adams. 



H. constricta, A. Adams in Sowerby's Tbesaur. vol. ii. p. 581, 

 pi. cxxiv. f. 9.5. 



Hab. Luzon, Philippines. 



The Aden shells agree exactly with the above-quoted figure and 

 with the types in the Museum. Sowerby's figure in the Conch. Icon, 

 f. 16 a-b is not so good as his earlier illustration in the ' Thesaurus.' 



182. Hydatina physis (Linn.). 



Hab. Indian and Pacific Oceans, Red Sea ; also We.-t Indies and 

 Brazil. 



Remarkable as it may appear, this species undoubtedly occurs in 

 the West Indies. In the British Museum are specimens from 

 Jamaica received from Mr. E. Chitty and others from St. Vincent's, 

 and recently a specimen was obtained at Pernambuco by Mr. Ramage 

 when investigating the fauna of Fernando Noronha. 



183. Hydatina circulata (Martyn). 



Hab. Mauritius, Ceylon, &c. Not yet noticed from the Red Sea. 



184. Umbrella indica, Lamarck. 



Hab, Aden (Caramagna) ; Indian and Pacific Oceans. 



II. PELECTPODA. 



185. Dosinia pubescens, Philippi. 



I), jmbescens, Phil., Romer, Mon. Dosinia, p. 79, pi. 15. f. 1. 

 Hab. Philippines, New Holland, and Madagascar (Romer). 

 With this species I unite Artemis scabriusculu, Reeve (? of 



