316 THE VIVARIUM. 
its eye. Its toes are webbed nearly to their extremities. It has 
a narrow and prominent glandular fold. The upper parts of the 
animal are violet-green, marked with dark brown, light-edged 
spots. Its legs, like those of so many Frogs, are cross-barred. 
The lower parts are yellowish-white. The male possesses internal 
vocal sacs. This Frog may be treated in the same way as has 
been suggested for the Edible Frog (2. esculenta). 
The Common Frog (&. temporaria, Fig. 81) is probably the 
most plentiful and the best known of all the Batrachians. It has 
Fic. 81.—THE COMMON FROG (Rana temporaria). 
a very extensive range, being found nearly all over Europe, and 
North and Temperate Asia. 
The Common Frog spends the winter in a state of hibernation, 
huddled up with great numbers of its own species in the mud at 
the bottom of ponds, where the temperature, though low, is fairly 
even. The Batrachians in such a position are not only safe from 
the effects of frost, but are also out of the reach of their many 
natural enemies. | 
The spawn of the Common Frog is deposited at the bottom of 
ponds and pools, and in a little while, owing to a certain amount 
