REVIEWS AND EXCHANGES. 
Aynphibia and Reptiles. By Hans Gadow, M.A., Ph.D., F.R.S., being 
volume viii. of “ The Cambridge Natural History.” Messrs. Macmillan and 
Co. Price 17s. net. 
The volumes of the Cambridge Natural History have hitherto appeared at 
such long intervals as to bring this practically indispensable work within the 
reach of even the more slender purse of any serious student or amateur. The 
study of amphibia and reptiles is, as Dr. Gadow says in his preface, “ not very 
popular,” as there “is a prejudice against creatures some of which are clammy 
and cold to the touch, and some of which may be poisonous. People who delight 
in keeping newts or frogs, tortoises or snakes, are, as a rule, considered eccentric.” 
Rana temporaria. Eight SUCCESSIVE 
Stages in the Develop.ment, from 
THE Egg to the almost co.mplete 
Frog (Natural Size). 
Rana escuhnla. T HREE Stages 
OF THE MOVE.MENT OF THE 
Tongue (Natural Size). 
As from our earliest days we have always belonged to this eccentric class, we 
naturally welcome Dr. Gadow’s comprehensive volume. It is, the author says, 
“intended to appeal to two kinds of readers — to the field-naturalist, who, while 
interested in life-histories, habits, and geographical distribution, beauty or strange- 
ness of forms, is indifferent to the homologies of the metasternum or similar 
questions ; — and to the morphologist, who in his turn is liable to forget that his 
specimens were once alive.” Whilst the work may, perhaps, suffer from the fact 
that one of the groups to which it is devoted has no popular English name. 
Dr. Gadow has an advantage over some of his fellow-contributors to the series 
in that he is able to devote a volume of nearly 700 pages to two groups which 
only comprise about 1,000 and 3,500 living species respectively, as against 
8,000 fishes and 10,000 birds. How admirably he, under these circumstances. 
