348 



ZOOLOGY 



in two long, parallel strings of albumen, which lie coiled at the 

 bottoms of ponds, hatch out in May, and metamorphose aljout 

 a month later. 



The frogs (Ranidic) are almost confined to the Northern 

 Hemisphere and the East Indies. In the northern United 



Fig. 



28. — Green frog, Rana clatnilans. Xat. size. Phrito. of Ii\-ing animal 

 by W. II. C. P. 



States there are some eight species, of which the com- 

 monest are : the leo]>ard-frog, of green color, with irregular 

 black blotches edged with whitish ; the pickerel-frog, light 

 brown, with two rows of oblong square brown 1 )lotches on the 

 back ; the wood-frog, living in damp woods, pale reddish l)rown> 

 with a brown l^and on the side of the head ; the green frog, of 

 uniform bright green to l:)rown color, with numerous small 

 dark spots, and with glandular folds (Fg. 328) ; and the bull- 

 frog, of great size, green, with small, faint spots on the 

 back. 



