List of Half-Tones 



Platk Facing Page 



LXXXI Figs. 255-256. Rana draytonii Baird and 



Girard: eight or more years old . . .216 



LXXXI I Fig. 257. Rana onca Cope. Figs. 258-259. 

 Rana aurora Baird and Girard: structure 

 studies 217 



LXXXI II Figs. 260-263. Structure studies of Rana pre- 



tiosa 220 



LXXXIV Figs. 264-266. Structural characteristics of 

 Rana hoylii Baird and Girard. Figs. 267-268. 

 Rana virgati-pes Cope : outHne of head ; size 

 of eye and ear; length of foot; relative 

 proportions of body and leg; markings of 



under parts 221 



LXXXV Figs. 269-271. The Southern Bullfrog 

 {Rana grylio Stejneger): beautiful frog; me- 

 tallic green on head and shoulders; long 

 narrow head; smooth undersurfaces of fin- 

 gers and toes 226 



LXXXVI Figs. 272-274. Rana grylio: toes long; head 

 pointed; eyes greatly elevated; texture of 

 skin; relative size of eye and ear; fold of 

 skin from eye to shoulder .... 227 

 LXXXVI I Fig. 275. Under the pickerel weed. The 

 Bullfrog is the most aquatic frog of North- 

 eastern North America {Rana cateshiana 



Shaw) 228 



^XXXVIII June. "We are hkely to hear and see Bull- 

 frogs if we go rowing on river or pond. 

 Bullfrogs prefer large ponds where the 

 water is screened from the shore by willow, 

 alder and other water loving plants " . 229 



LXXXI X Figs. 276-277. Studies of the Bullfrog: 

 spots of the back; ear; fold of skin extend- 

 ing backward from the eye, around the ear 

 and down to the shoulder . . . .232 

 XC Fig. 278. The Bullfrog is heard in the 

 ponds by the first of May. Rana cateshiana 



Shaw, Wisconsin 233 



XCI Fig. 279. Drawing to show the floor and roof 



xm 



