INTRODUCTION. 



In this part of the "Naturalists' Directory" the' addresses of the vari- 

 ous persons are given under a systematical arrangement. A geogra- 

 phical grouping of the names and an alphabetical index will follow. 



The number preceding each name is given to facilitate indexing. 



This part will be issued with the "Proceedings," several pages at a 

 time, as fast as it can be prepared. 



The Editor returns his thanks to the numerous friends who have 

 aided him, since the publication of the first part, by sending new names 

 and corrections, and earnestly hopes that his attention may be called 

 to any mistakes or omissions noticed in this second part, at as early a 

 day as possible. 



Information respecting Naturalists residing in the Southern States 

 and Mexico is especially requested. 



Those persons who have not answered the circulars forwarded to 

 them are requested to do so, even if their addresses are correctly given, 

 as it is only from the personal statement of each that perfect confidence 

 can be had in the printed list. In regard to this subject, the Editor 

 would state that answers have been received to the greater part of the 

 circulars issued. The addresses which are left doubtful from the non 

 receipt of answers, will be designated at the close of this part. 



Notices of the decease or change of address, of persons whose 

 names appear in the Directory are particularly requested. 



Owing to tfie large number of names which have been received since 

 the first twenty pages of this part of the Directory were issued, and 

 the various corrections which have been made, it has been thought 

 best to reprint them, especially as it was desirable to slightly change 

 the arrangement of the names. Subscribers to the work will therefore 

 please substitute this edition for the former. 



F. W. PUTNAM, 



Editor. 



ESSEX INSTITUTE, SALEM, MASS., 

 May 1, 1866. 



