PREFACE. 
In consequence of a very generally expressed wish amongst the 
personal friends of the late Professor A. H. Garrod, to possess 
some permanent memorial of him, it was decided, at a meeting of 
the Zoological Club held on May 4th, 1880, to appoint a Committee 
to consider the best means of carrying this idea into execution. 
As ultimately constituted, this Committee consisted of Profes- 
sors Flower, Schiifer, Bell ; Messrs. Sclater, Salvin, Balfour, Dobson, 
the late Mr. Alston, Dr. Giinther, and myself, I agreeing to act as 
secretary to it. 
After carefully considering the various forms that the proposed 
memorial might take, it was decided that the most appropriate and 
desirable one would be the publication, in a collected form, of all 
the papers published by Garrod in various scientific journals and 
periodicals, with a portrait and memoir of the author. 
The list of subscribers to the present volume, including, as it 
does, the names of nearly all the leading English biologists as 
well as those of numerous private friends, shows that this deci- 
sion of the Committee has been amply justified by the result. 
The work of arranging and editing the papers in the present 
volume has in the main fallen on myself, though Professor E. A. 
Schifer was kind enough to read through the proofs of the physio- 
logical part. As far as possible, the papers in each part have been 
kept in the order in which they were published: in a few cases, 
however, when several papers treating of the same or closely-allied 
subjects appeared at different periods, they have, where it seemed 
desirable, been placed together. The last paper in the volume, as 
explained in the biographical memoir, has not been published 
before anywhere. 
Misprints and other clerical errors of the original have been 
corrected in this reprint, and in a few cases, where it seemed 
advisable, foot-notes have been added by myself. The pagination 
of the original papers has been preserved by the use of marginal 
figures. le 
