vi PREFACE. 
The octavo lithographic plates of the original papers have been 
_ redrawn by Mr. J. Smit for the purpose of this reprint, and they 
will, I think, be found faithful copies of the originals. The stones 
of the quarto plates being still preserved have, with the necessary 
alterations in lettering, been used again, as have also the plates of 
the three diagrams in the second part. The three plates illustrat- 
ing the first part have been redrawn, the first two being reproduced 
on a somewhat larger scale the better to suit the letterpress. The 
woodcuts in the text have been throughout printed from the 
original blocks, or from electrotypes of them, with the exception of 
that on p. 95, which was kindly drawn on wood, after the litho- 
graphed plate in the “ Journal of Anatomy,” for the purposes of 
this work by Mr. H. H. Johnston. 
The etching which forms the frontispiece speaks for itself, both 
as a work of art and as a portrait. The readiness with which 
Mr. Herkomer undertook to execute it was itself extremely grati- 
fying to the Committee, whilst the success of the result adds 
materially, they feel, both to the value and the interest of the pre- 
sent volume. 
The biographical memoir has been written by me, partly from 
my own personal acquaintance with the author and his work, 
partly from facts supplied me by his family. The index to Part IT, 
containing as it does the names of all the various species or groups 
of animals mentioned in it, will, it is hoped, prove useful as 
facilitating reference to the very numerous facts contained in these 
papers. 
Finally, on behalf of the Garrod Memorial Committee, I have to 
express our best thanks to the Committee of Publication of the 
Zoological Society, and to the Editors of the “ Journal of Anatomy 
and Physiology,” the “Ibis,” and “Nature,” for the very generous 
loans, for the purposes of this reprint, of the various stones or 
blocks of the plates and woodcuts illustrating the present volume 
which originally appeared in their publications, as well as to the 
Council of the Royal Society, who kindly allowed us the use of 
electrotypes of the diagrams published in the “ Proceedings” of 
that Society. 
W. A. FORBES. 
June 24th, 1881. 
