List of Half-Tones 



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LXXXIX 



XC 



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Plate Facing Page 



LXXXI Figs. 255-256. Rana draytonti Baird and 

 Girard: eight or more years old . 

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

 Rana aurora Baird and Girard: structure 



studies 



V LXXXI II Figs. 260-263. Structure studies of /?awdt ^r^- 



tiosa 



^ LXXXIV Figs. 264-266. Structural characteristics of 

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

 Rana virgaiipes Cope: outline of head; size 

 of eye and ear; length of foot; relative 

 proportions of body and leg; markings of 



under parts 



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 



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 .... 

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

 Bullfrog is the most aquatic frog of North- 

 eastern North America {Rana catesbiana 



Shaw) 



LXXXVI 1 1 June. "We are likely 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 " 

 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 .... 

 Fig. 278. The Bullfrog is heard in the 

 ponds by the first of May. Rana catesbiana 



Shaw, Wisconsin 



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



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