390 MR. E. A. SMITH ON SHELLS FROM ADEN. [Juue 16, 



3. On a Collection of Marine Shells from Aden, with some 

 Remarks upon the Relationship of the Molluscan 

 Fauna of the Red Sea and the Mediterranean. By 

 Edgar A. Smith, F.Z.S. 



[Received June 10, 1891.] 

 (Plate XXXIII.) 



The specimens hereafter catalogued were collected at Aden between 

 tide-marks or at low water by Major J. W. Yerbury, R.A., and the 

 Rev. A. W. Baynham. To the former the British Museum is indebted 

 for a very valuable series of 555 specimens, and from the latter it 

 received 160 specimens. Nearly all are in excellent condition, and 

 much praise is due to these gentlemen for devoting so much time 

 and trouble to their cleaning and preservation. No complete list of 

 the Mollusca of this particular spot has yet appeared, and it is as 

 a contribution to such a Catalogue that I venture to publish the 

 following. Many species have already been quoted from Aden, but 

 to have searched through the vast mass of Conchological literature 

 which exists, in order to get together a complete list of the fauna, 

 •would have occupied more time than could at present be spared. 



Dr. F. Jousseaume, in the ' Me'moires de la Societe Zoologique de 

 France' for 1888, has enumerated the species collected in the Red 

 Sea and Gulf of Aden by Ur. Faurot in 1885, and among the species 

 quoted are a number (about 26) from Aden itself. Another list of 

 106 species from this locality was given by G. Caramagna in the 

 ' Bollettino della Societa Malacologica Italiana,' vol. xiii. IS^^S. 



Some of the species mentioned in these Catalogues were not met 

 with by Major Yerbury or Mr. Baynham, and these I have given in 

 a supplemental list at the end of this paper. The species quoted from 

 the present collection which also appear in the works of Jousseaume 

 and Caramagna are indicated by the locality Aden being inserted in 

 the distribution, with the names of one or both of these writers 

 appended. 



The fauna of the Red Sea is essentially tropical, and forms the 

 north-west limit of the Indo-Pacific fauna. The great mass of the 

 species found at Aden have been met with at various places further 

 up the Red Sea, and many of them occur even at the northern end, 

 in the Gulfs of Suez and Akaba ; the majority also have a wide 

 distribution over the Indian and Pacific Region. 



I have not thought it necessary to give references to all the species, 

 most of which are well known ; but it is to be understood that 

 they are recognized as determined in the Monographic works of 

 Reeve, Sowerby, and Kiister, viz. the ' Conchologia Iconica,' the 

 'Thesaurus Conchyliorum,' and the ' Conchylien-Cabinet,' ed. 2. 



Notes respecting the identification of certain species have been 

 inserted when any doubt has existed, and it is trusted some of these 

 observations may be useful, as, in many cases, they are based upon 

 comparison of the types. The present paper may also be of some 



