Index 



Gill chambers, 236, 237. 

 Gills, 14, 68, 60, 179-181, 236, 237. 

 Gopher Frog, see Rana ccsopus. 

 Grass Frog, see Rana pipiens. 

 Green Frog, see Rana damitans. 

 Green Tree Frog, see Hyla cinerea. 



Hermit spadefoot, see Scaphiopus holbrookii. 

 Hibernation, 15, 33, 88. 

 Hyla andersonii, 26, 38, 46, 131-133. 

 arenicolor, 41, 46, 122-124. 

 carolinensis, see cinerea. 

 cinerea, 24, 40, 47, 126-128. 

 evittata, 38, 47, 128-130. 

 fentoralis, 47, 150-151. 

 graiiosa, 24, 27, 46, 124-126. 

 pickeringii, 4, 20, 21, 24, 38, 46, 13S- 

 148. 139-142 (voice), 143-144 (col- 

 our), 145-147 (life history). 

 regilla, 4, 24, 26, 41, 47, 134-138. 

 squirella, 24, 47, 148-150. 

 versicolor, 24, 27, 38, 46, 117-122, 119 

 (colour), 120 (protection), 121-122 

 (life history). 

 V. phceocrypia, 120. 

 Hyla of the Pine Woods, see Hyla fentoralis. 

 Hylid^,7, 9. 14, 19, 26, 39, 43, 46, 117- 



162. 

 Hypopachus cuneus, 19, 48, 169-170. 



Inhibition, 31. 

 Intelligence, 34. 

 Interference cells, 25. 



Key to BuFONiDyE, 44. 

 Cystignathid^, 4S. 



ENGYSTOMATID.e, 48. 



Families, 43. 

 Hylid^, 46. 

 Pelobatid-«, 43. 



RaNID/E, 48. 



Labyrinth tests, 29. 



Lachrymal canal, 5. 



Larva, see tadpole. 



Lateral line sense organs, 6. 



Leeches, 4. 



Leopard Frog, Common, see Rana pipiens. 

 Southern, see Rana sphenocephata. 



Life History, 3-7 (general), 55-56 {S. hol- 

 brookii), 67-73 (-6. americanus), 96 

 (,B. fowleri), 121-122 {H. versicolor), 

 137-138 (H. regilla), 145-148 (H. 

 pickeringii), 156 {Acris gryllus), 159- 

 160 (Chorophilus nigritus), 175-185 

 (R. pipiens), 191-192 (i?. palustris), 

 204-205 (i?. damitans), 208-2 io( R. 

 sylvatica), 219 (/?. pretiosa), 225 (R. 

 septentrionalis), 234-238 (R. cates- 

 biana). 



Linnaeus, 11. 



Literature, 76-77 (footnote), 



Lithodytes latrans, 39, 40, 46, 163-164. 

 ricordii, 46, 164. 



Merriam's Life Zones, 37-38. 



Metamorphosis, 5-7, 69-71, 204-205, 235- 

 238. 



Mink Frog, see Rana septentrionalis. 



Moulting skin, 73 (Bufo americanus), 201 

 (Rana damitans). 



Mouth structure of tadpoles 69 (B. ameri- 

 canus), 97 (S. fowleri), 121 (H. ver- 

 sicolor), 146 (H. pickerinii), 156, 

 {Acris gryllus), 1 60 (Chorophilus), 181 

 \R. pipiens), 191 (R. palustris), 210 

 (R. sylvatica), 235 {R. catesbiana). 



Mouth structure of toads and frogs, 81, 



^33- 

 Mud puppy, 2. 



Narrow-mouthed Toads, see Engysto- 



MATID^. 



Necturus, 3. 

 Neotropical Region, 37. 

 Newts, 2. 



Nocturnal habit, 83. 



Northern Frog, see Rana septentrionalis. 

 Northern Wood Frog, see Rana cantabri- 

 gensis. 



Oak Toad, see Bufo quercicus. 



Opercular membrane, 6, 14, 68, 70, 181, 337. 



Orientation, 32. 



Pacific Tree Frog, see Hyla regilla. 



Pain scream, 32, 233. 



Peeping Frog, see Hyla pickeringii. 



Pelobatid.*, 4, 5, 7, 14, 26, 43, 53-62. 



Pentadactyle limbs, 1, 13. 



Phototactic, 32. 



Phylogeny, 11-15. 



Pickerel Frog, see Rana palustris. 



Pickering's Hyla, see Hyla pickeringii. 



Pigment cells, 22-23. 



"Playing dead," 34, 71, 87. 



Poison, 16-18, 79-80. 



Pond Frog, see Rana damitans. 



Proreptilia, 12. 



Protection, 17, 33, 34, 86-88, 120, 130, 138, 



219. 

 Protective resemblance, 27, 34, 87, 120; 



Figs. 61, 81, 134, 137, 212, 239. 



Rain of Toads, 71. 



Rana cesopus, 17, 20, 49, 193-196. 



areolaia, 20, 40, 49, 192-193. 



areolata cesopus, see cesopus. 



areolata capita, see areolata. 



areolaia circulosa, see areolata. 



aurora, 26, 41, 49, 216-218. 



boylii, 41, so, 221-222. 



cantabrigensis, 38, 49, 211-213. 



cantabrigensis latiremis, 11, 38, 212. 



catesbiana, 3, i8, 20, 21, 26, 27, 50, 

 196, 227-240, 228 and 234 (food), 230 

 (colour change), 231 (swimming), 

 231-232 (respiration), 232-233 

 (voice), 233 (mouth structure), 234 

 (economic value), 234-238 (metamor- 

 phosis), 236-238 (breathing of tad- 

 pole). 



clamata, see damitans. 



damitans, 38,49, 197, 198-205,198-200, 

 (voice), 200-201 (comparison with 

 Bullfrog), 201 (moulting), 202-203 

 (food), 204, (eggs), 204-205 (meta- 

 morphosis). 



draytonii, 4, 26, 41, 49, 213-216. 



draytonii onca, see onca. 



fisheri, see onca. 



grylio, 20, 26, 27, so, 226-227. 



onca, 27, 49, 196-198. 



palustris, 26, 38, 48, 188-192, 190 

 (food), 191-192 (life history). 



pipiens, 4, 5, 20, 27, 38, 40, 41, 49, 

 171-185, 172 (vocal pouches), 173 

 (breathing), 174 (colour), 175 (moult- 

 ing), 175-176 (eggs), 176-181 (de- 

 velopment), 181 (mouth structure 

 of tadpole), 181-184 (enemies of 

 tadpole), 185 (economic value), 

 187. 



pretiosa, 4, 26, 41, 49, 218-221. 



septentrionalis, 50, 224-226. 



252 



