29 fi 
PREFACE. 
THE specimens of Shells in the following List marked 
' B.M. were received from Professor Alcide d’Orbigny, as 
the type specimens described by him in the “ Histoire 
Naturelle des Iles Canaries, par MM. P. Barker-Webb et 
Sabin Berthelot, Membres de plusieurs Académies et Sociétés 
savantes. Ouvrage publié sous les auspices de M. Guizot, 
Ministre de l’Instruction publique. Paris, 1834-44, 4to, 
2 tomes.”’ 
The specimens are on their original cardboard trays, 
named by M. d’Orbigny, and marked with their special 
habitats. } 
JOHN EDWARD GRAY. 
1 Sept. 1854. 
