List of Half-Tones 



PLATE 



LXVI 



LXVII 



LXVI 1 1 



LXIX 

 LXX 



LXXI 

 LXXII 



LXXIII 

 LXXIV 



LXXV 

 LXXVI 



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LXXVI 1 1 



LXXIX 



LXXX 



FACING PAGE 



Figs. 208-21 1. Growth of the LEOPARD FROG 

 TADPOLE 179 and 180 



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 



Figs. 2 1 3-2 1 6. Studies of the SOUTHERN LEOP- 

 ARD FROG (Rana spbenocephala Cope) . .186 



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 LEOPARD FROG (Rana splenoce- 

 pbala Cope): structure of head; length and 

 other structural characteristics . . .187 

 "The brook and the meadows near by make the 

 home of the Pickerel Frogs" . . . .188 



Figs. 221-222. Studies of PICKEREL FROGS 

 (Rana palusiris Le Conte) . . . . 1 89 



Rana areolata Baird and Girard: charac. points 192 



Figs. 226-228. Structural characteristics of 

 Rana czsopus Cope 193 



Figs. 229-234. Studies of the GREEN FROG . 200 



Figs. 235-241. Metamorphosis of the GREEN 



FROG (Rana clamitans Latr) . . . .201 

 "The home of the WOOD FROG (Rana sylvatica 

 Le Conte)" 206 



Figs. 242-245. Studies of the WOOD FROG 

 (Rana sylvatica Le Conte) . . . .207 



Figs. 246-247. Eggs of the WOOD FROG. Fig. 



248. Hatching WOOD FROG TADPOLES. Fig. 



249. SALAMANDER (Amblysioma opacuni) eggs 

 fastened to oak leaf. Fig. 250. The WOOD 

 FROG leaves the pond while the bepatica is 



still in bloom 212 



Figs. 251-254. Structure studies of Rana dray- 

 ionii Baird and Girard: foot; length of fin- 

 gers; size and arrangement of spots . . 213 



XII 



