INTRODUCTION. 
This Catalogue contains a list of all the Types and Figured Specimens 
of Cephalopoda in the Collection so far as at present known. The 
majority are in the General Collection, but a number of the types belong 
to the Sowerby, William Smith, Gilbertson, and Edwards Collections. 
The list also includes one or two specimens which, though not figured, 
have been specially referred to in literature. 
Each specimen is entered under the name given to it when it was 
first figured or described ; those names subsequently applied to any 
particular specimen being appended in chronological order and a cross- 
reference given from each. 
The figures in square brackets after each entry correspond to the 
number of the specimen in the Eegister. 
If the specimen is specially referred to in the text of the work quoted, 
this page is cited ; if not, the page on which the species is described is 
entered. When the author’s name immediately following the name of 
the species is placed in brackets, it refers only to the species and not 
to the genus. 
In the main subdivisions of the Lias (Upper, Middle, and Lower), the 
grouping adopted by the Geological Survey of Great Britain has been 
used {vide H. B. Woodward’s ‘ Geology of England and Wales,’ 1887, 
p. 258). This differs somewhat from that employed by Dr. Wright. 
A few specimens are included which have been wrongly referred to the 
Cephalopoda. An explanatory note is appended to each of these. 
G. C. CRICK. 
Geological Department, 
British Museum (N. H.), 
23rd March, 1898, 
