2 
ZOOLOGICAL LITERATURE. 
nent^ inasmuch as the author treats of extinct as well as re- 
cent forms, devotes separate chapters to histological and deve- 
lopmental anatomy, constantly referring to physiological facts, 
which we commonly find are entirely neglected in general works 
on comparative anatomy, We need sparcely mention that the 
author’s philosophical turn of thought and expression is one of 
the most noticeable and peculiar features of the work ; it is 
apparent on almost every page — ^in his tracing the relations of 
homology. 
T^YQ volupies appeared in the course of last year. The first 
cornmences with a description of the characters of Vertebrates 
generally, and contains a complete account of the anatomy of 
Hcamatocrya, In the second the anatomy of Birds and the 
osteology of Mammals arc completed. The third and last 
volume will appear shortly, end conclude the anatomy of the 
latter class. The text is profusely illustrated by a series of 
woodcuts, partly original, partly reprinted from other special 
works or the author’s own previous publications. 
Gray, J. E. Catalogue of Seals and Whales in the British 
Museum. Second edition. London, 1866. 8vo. pp. 402, 
with numerous woodcuts. 
Although this work is entitled a second edition of the cata- 
logue published in 1850, its contents are so much enlarged by 
the author’s own researches, and by numerous references to, and 
abstracts from, other memoirs, that its whole appearance has 
been altered. As if contains descriptions not only of tlip , spe- 
cies in the British Museum, but also of those known to exist in 
other collections, it forms a handbook indispensable to the 
student of these animals, and, indeed, to every one who is de- 
sirous of acquainting himself with the extent of the progress 
made during the last fifteen j^ears in this branch of zoology. 
Of coui'se, in groups so difficult of access to the zoologist as the 
Seals and the Cetacea, many points must be left doubtful, and 
others, with better materials, will be able to correct errors ; but 
having witnessed the amount of labour bestowed by the author 
on this work during many years, the Becorder has come to the 
. conviction that these groups of Mammalia can be treated suc- 
. cessfully only by men who, like the author, have prepared them- 
selves for so difficult a task by long previous study, whilst the 
premature publications of beginners merely contribute to in- 
crease the labour of others. 
^ I^schriciit, Eeinhardt, and Lilljeborg. Becent Menroirs on 
the Cetacea. Edited by W. H. Elower. Bay Society, 
1866. 4to. pp. 309, with six plates and numerous -wpodcuts. 
The Council of the Bay Society have published an English 
translation of most important Memoirs on Cetaceans, the de- 
tails of which, being written in Swedish and Danish, haye re- 
