ENT RODUCPTION: 
THIs Catalogue includes in addition to the types proper, 
those specimens which have been figured and described as 
examples of species previously defined. 
The names at present accepted are printed in Clarendon type, 
the synonyms in italics. After a considerable portion of the 
work had been printed, it was suggested to me that it would 
have been better to have given only the names under which 
the specimens were described, or at any rate to have given 
greater prominence to these rather than to the names now 
accepted. In some ways this method would certainly have 
been more convenient than the one adopted. 
In order to make the work more complete, I have gone 
through a large amount of paleontological literature, and have 
in this way found in the Museum many types whose existence 
here was previously unsuspected. Nevertheless, there can, I 
think, be no doubt that others will in time be discovered. 
The following is a list of the authors who have described 
specimens in the Museum :—A. L. Adams, L. Agassiz, D. T. 
Ansted, L. Barrett, F. A. Bather, W. Bean, T. Bell, G. T. 
Bettany, J. F. Blake, C. J. F. Bunbury, P. H. Carpenter, 
W. Carruthers, J. Carter, C. Coignou, T. Davidson, J. W. Davis, 
J. Donald, P. M. Duncan, H. M. Edwards, R. Etheridge, 
R. Etheridge, jun., H. Falconer, T. W. Fletcher, A. H. Foord, 
