484 ME. H. N. RIDLEY ON THE 



these were also collected by Mr. Eidley, who has now added 44 

 additional species to the list. 



The general facias of the marine Molluscan fauna is quite of a 

 West-Indian type, as a perusal of the following pages will show; 

 and it will also be observed that some of the species have a much 

 wider and in some instances a very peculiar range. Of the land- 

 shells two are known AVest-Indian species, one has been recorded 

 from Brazil, Peru, and the island of Opara, and the remaining 

 four, up to the present, appear to be peculiar to the island. 

 One of these, however, Bulhmis liamagei, suggests a faunistic 

 similarity to Brazil, as the section of Bulimns to which it belongs 

 {Tomigerus), with one exception, occurs only in that country. 



The single freshwater species suggests no I'elatiouship with 

 any particular region, and might exist anywhere, similar forms 

 being found both in the Old and New Worlds. 



The following pages contain an account of the species obtained 

 by Mr. H. N. Eidley and his colleagues, after which is appended 

 a list of those recorded in the ' Challenger ' Reports. 



I. MAEINE SPECIES. 



1. Octopus eugosls, Bosc. 



Hah. Mediterranean, Cape Verde Islands, AVest Indies, Eio 

 Janeiro, &c. 



This species is common in pools at low water. After being 

 dried in the sun the arms are made into soup and eaten by the 

 natives. Mr. Eidley, however, informs me that it is comparatively 

 tasteless and of a soft gelatinous consistency. 



2. CoNUS NEBULOSUS, Solauder. 



Hah. West Indies : Barbados, Cuba, Martinique, Sta. Lucia. 



The operculum of a shell 65 millim. in length is 17 long and 

 only 4^ wide. It is thickened and carinate along the middle 

 beneath, the muscular scar occup^nng more than half the entire 

 length, and the nucleus is not terminal as stated by Messrs. 

 Adams * and Ti*yon f in their respective Manuals of Conchology, 

 but situated three millim. from the extremity. The growtli at 

 first is regularly concentric, but subsequently, to suit the nar- 

 rowness of the a2:)erture of the shell, the layers of increase are 



* ' Genera of Eecent Mollusca,' vol. i. p. 24:(). 



i' ' Structural and Systematic Conchology,' vol. ii. p. 187. 



