PREFACE. 
Durine the time in which the first volume of this work, published 
in 1851, was passing through the press, its estimable author was in a 
very delicate state of health. So reduced, indeed, was he by a lingering 
illness, that he felt himself unequal to the task of compiling an Analytical 
Index, according to the plan which he had followed in the two volumes 
on ‘* RARE AND REMARKABLE ANIMALS OF SCOTLAND ;’ and a few weeks 
after the publication of the volume, his disease terminated fatally. 
Sir Joun Datyett had contemplated proceeding immediately with 
the preparation of the second volume, if his life had been spared, and, 
towards the accomplishment of his object, he had, to some extent, ar- 
ranged his notes of descriptions of species, intending to correct and 
transcribe the whole for the press. Several Plates had likewise been 
executed, and many drawings were in some measure assorted as materials 
ready to be placed in the hands of the engraver. 
In this state of things, it was considered by his Sister, who always 
lived with him, as a duty, to make an effort and save for the public benefit 
a large amount of valuable information, the result of the continuous la- 
bour, through many years, of an acute, patient, and intelligent observer. 
This zeal to promote the author's fame, and advance at the same time the 
interest of science, was naturally to be looked for from the individual re- 
ferred to in the 2d volume of “ Rare and Remarkable Animals of Scotland,” 
p. 99, where, in reference to the Cristatella, he says, “ I am indebted to 
Cc 
