484 
ME. H. N. RIDLEY ON THE 
these were also collected by Mr. Kidley, who has now added 44 
additional species to the list. 
The general facies 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 West-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, Bulimus Bamagei, suggests a faunistic 
similarity to Brazil, as the section of Bulimus to which it belongs 
( Tomigerus ), with one exception, occurs only in that country. 
The single freshwater species suggests no relationship 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. Bidley and his colleagues, after which is appended 
a list of those recorded in the ‘ Challenger ’ Beports. 
I. MABINE SPECIES. 
1. Octopus rugosus, Bose. 
Bab. Mediterranean, Cape Verde Islands, West Indies, Bio 
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. Bidley, however, informs me that it is comparatively 
tasteless and of a soft gelatinous consistency. 
2. Conus nebulosus, Solander. 
Bab. West Indies : Barbados, Cuba, Martinique, Sta. Lucia. 
The operculum of a shell 65 millim. in length is 17 long and 
only 4g wide. It is thickened and carinate along the middle 
beneath, the muscular scar occupying more than half the entire 
length, and the nucleus is not terminal as stated by Messrs. 
Adams * and Tryon t in their respective Manuals of Conchology, 
but situated three millim. from the extremity. The growth at 
first is regularly concentric, but subsequently, to suit the nar- 
rowness of the aperture of the shell, the layers of increase are 
* ‘ Genera of Recent Mollnsca,’ vol. i. p. 246. 
t ‘ Structural and Systematic Conchology,’ vol. ii. p. 187. 
