INTRODUCTORY REMARKS. 
105 
of the British Museum, in 1814, almost all the descriptions of the animals 
given by Blainville and Rang, as well as many of those in Cuvier’s Animal 
Kingdom, are taken from the figures in Adanson, Argenville and others, and 
not from the animals themselves. In some instances, indeed, the description 
has not even been taken from figures which really belong to the genus — as 
is the case with Natica; the description of this animal in Blainville and 
Rang being derived from the Fossar of Adanson, which is probably a Lit- 
torina ; and again, Lamarck has in the most extraordinary manner united 
the animal of Coriocella (the Sigaret of Cuvier), and the shell Sigaret of 
Adanson to form his genus Sigaretus, without discovering that they belonged 
to different orders. 
To the descriptions of the animals 1 have not only added a short account 
of such of the species and genera as were new, but have also noticed such 
other species collected by the officers of the expedition, or by the before- 
mentioned gentlemen, as furnished me with any new observations, either in 
reference to their nomenclature, or to their natural history. 
