INTRODUCTION. 
By P. L. SCLATER, M.A., P.D., F.RS 
At the request of Messrs. Salvin and Godman, I have had great pleasure in putting 
together such remarks as are required to explain the Tables which our lamented friend 
_ the Author of this volume had drawn up shortly before his death for the better under- 
S standing of the Central-American Mammal-fauna. ‘These tables were the only part of 
2 the proposed “Introduction” that Alston left behind him; but I think they serve to 
_ show fairly enough the views upon the subject which he held, and which, I believe, do 
not essentially differ from those which, under the circumstances of the case, it has been 
left for me to put forward as the result of his investigations. 
The first of these Tables gives a complete list of the Mammals of Central America 
eCO mized i in this Memoir and in the Appendix thereto*. The range of each species 
in the various countries comprised within the Gontrali Acacia area is given in parallel 
umns, and also details as to its extension into North America on the one hand and 
America on the other. 
the Appendix was finished Mr. Forrer has sent to Messrs. Salvin and Godman another small 
: State of Durango, of which Mr. Thomas has given an account in P. Z. 8. 1882 (Nov. 14th). 
de t , of which examples were contained in this collection, are new to the Central-American — 
ammcly: Sciutus cherti snd Tamiat asinticus, subsp. guadrivittatus. In another small collec- — 
‘the same source still more reeently, three examples of Neotoma fuscipes, Baird, another 
new to Mexico, occurred. But I have not thought it advisable to alter Alston’s tables for the 
» these three species. 
a2 
vice Balgregtt 5 . 
i SN tae stn 
