List of Half-Tones 



Plate Facing Page 



LXVI ) Figs. 208-21 1. Growth of the Leopard Frog 



LXVII ) Tadpole 179 and 180 



LXVI 1 1 Early July. " The border of the pond where the 

 young Leopard Frogs develop among the 

 pickerel weeds and water lilies." Fig. 212. 

 The Leopard Frog protected by resemblance 



to grass and clover 181 



LXIX Figs. 213-216, Studies of the Southern Leop- 

 ard Frog {Rana sphenocephala Cope) . .186 

 LXX Figs. 217-218. The Common Leopard Frog 

 (Rana pipiens Shreber): head more or less 

 pointed; blotch at centre of ear; dark spot on 

 head in front of eyes. Figs. 219-220. The 

 Southern Leop.. d Frog (Rana sphenoce- 

 phala Cope): structure of head; length and 

 other structural characteristics . . .187 

 LXXI "The brook and the meadows near by make the 



home of the Pickerel Frogs" . . . .188 

 LXXI I Figs. 221-222. Studies of Pickerel Frogs 



(Rana palustris Le Conte) . . . .189 

 LXXI II Rana areolata Baird and Girard: charac. points 192 

 LXXIV Figs. 226-228. Structural characteristics of 



Rana cesopus Cope 193 



LXXV Figs. 229-234. Studies of the Green Frog . 200 

 LXXVI Figs. 235-241. Metamorphosis of the Green 



Frog {Rana clamitans hddr) . . . .201 

 LXXVI I "The home of the Wood Frog {Rana sylvatica 



Le Conte)" 206 



LXXVI 1 1 Figs. 242-245. Studies of the Wood Frog 



{Rana sylvatica Le Conte) . . . .207 

 LXXIX Figs. 246-247. Eggs of the Wood Frog. Fig. 



248. Hatching Wood Frog Tadpoles. Fig. 



249, Salamander {Amhlysioma opacum) eggs 

 fastened to oak leaf. Fig. 250. The Wood 

 Frog leaves the pond while the hepaiica is 



still in bloom 212 



\ LXXX Figs. 251-254. Strwciure. studies oi Rana dray- 

 tonii Baird and Girard: foot; length of fin- 

 gers; size and arrangement of spots . .213 



