List of Half-Tones 

 Plate Facing Page 



^ LI 1 1 Figs. 165-169. Hyla regilla Baird and Girard: 

 the skin; eggs laid in clusters; vocal pouch and 

 other structural characteristics .138 



LIV "Most of the Spring Peepers live on the ground 

 in the woods throughout the year except for 

 a few weeks in early spring, when they are 

 to be found in the ponds and the marshes 



adjacent." 139 



LV Figs. 170-172. Hdihiisoi Hyla pickeringii Stover, 148 

 LVl Figs. 173-177. Studies of The Southern Tree 

 Frog {Hyla squirella Bosc) : a delicate, smooth- 

 skinned little tree frog, one of the most active 



in North America 149 



LVII Figs. 178-183. Smilisca haudinii: changes from 

 nearly black to delicate light green or fawn 

 colour; fingers with slight webs; structure study 



of under parts 1 52 



LVII I Fig. 184. Studies of the Cricket Frog {Acris 

 gryllus Le Conte). Fig. 185. Studies of the 

 Swamp Tree Frog (Chorophilus n. jeriarum 



Baird) 153 



LIX Figs. 186-187. Lithodyteslatrans Cope. Fig. 188. 

 Liihodytes lairans: characteristics of under 



surface 164 



LX Figs. 189-192. Engy stoma carolinense Holbrook. 



Fig. 193. Engy stoma texense Girard . .165 

 LXI Figs. 194-196. Hypopachus cuneus Cope: fat 

 squat body; fold of skin on the top of head 

 back of eyes; structure of hand and foot; ver- 

 tebral streak; arrangement of spots and bands 

 of black on upper surface . . . .170 

 LXI I "The Leopard Frog lives in meadows and fields 



adjacent to brooks and marshes" . . • 171 

 LXI 1 1 Figs. 197-199. Leopard Frogs {Rana pipiens 

 Shreber): structure study of hand and foot; 

 typical young Leopard Frogs . . . .176 

 LXIV Figs. 200-201. Characteristics of the Common 



V.eovxkdFkog {Rana pipiens SAixeher) . -177 

 LXV Development of the Leopard Frog's Egg . .178 



