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Show 1891] MR- E. A. SMITH O N SHELLS 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, hand carinata, concolor, pallide fuscescens; valva antica costis radiantibus circiter 22 granulatis instruct arece laterales e radiis duobus forte granulatis constitce, longitudinaliter granulose liratce, liris in medio quam lateralibus, postica liris tenuibus ad 25 granulatis ligamentum pallide fuscescens, minutissime squamu-latum. Longit. 14 millim., diam. 9|. The sculpture of this species is of the same character as that of 0. antiquus, Reeve, but not quite so pronounced, and the rays of both the terminal valves are more numerous. 180. BULLA AMPULLA, Linn. Hab. Indian and Pacific Oceans, Red Sea; Aden (Caramagna <$f Jousseaume). 181. HAMINEA CONSTRICTA, A. Adams. H. constricta, A. Adams in Sowerby's Thesaur. vol. ii. p. 581, pi. cxxiv. f. 95. 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 West 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. H Y D A T I N A 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. PELECYPODA. 185. DOSINIA PUBESCENS, Philippi. D.pubescens, Phil., Rdmer, Mon. Dosinia, p. 79, pi. 15. f. 1. Hab. Philippines, New Holland, and Madagascar (Rdmer). With this species I unite Artemis scabriuscula, Reeve (? of |