Rana pipiens burnsi, 3, 178, 179, 181 

 Rana pipens kandiyohi, 180, 181 

 Rana pipiens pipiens, 3, 6, 7, 8, 3^, 



34, H3, 151, J 7 2 , 175, 178, 179, 



180, 181, 186, 187, 198 

 Rana pretiosa luteiventris, 182, 183 

 Rana pretiosa pretiosa, 32, 182, 183 

 Rana septentriona/is, 31, 172, 184, 185 

 Rana sphenocephala, 7, 31, 34, 177, 



178, 186, 187 

 Rana sylvatica, 7, 8, 32, 163, 175, 177, 



178, 188, 189 

 Rana tarahumarae, 32, 190, 191 

 Rana virgatipes, 7, 30, 169, 173, 185, 



192, 193 

 Range, 3. See each species account 

 Ranidae, 2, 3, 6, 10, 14, 30-34, 148- 



193 



Raninae, 3 



Rattler, 1,80,81 



Reagen, A. B., 215 



Rebb, Mr., no, 145 



Reed, C. L., 200 



Red-spotted toad, 70, 71 



Reptiles (Reptilia), 2, 77, 113, 139, 



147, 148, 201 

 Rhoads, S. N., 215 

 Rhode Island, 215 

 Ribbed frogs, 1, 4, 6, 12 

 Ribbed toad, 1, 4, 6, 7, 9, 10, 12, 13 

 Ricord's frog, 29, 140, 141 

 Ridgway, R., 12 



River-swamp frog, 1, 31, 170, 171 

 Robber frogs, 2, 4, 8, 14, 28, 29, 136- 



147 

 Rocky mountain frog, 154, 155, 184, 



185 



Rocky Mountain toad, 20, 78, 79 

 Rough chorus frog, 86, 87 

 Ruthling, P. D. R., 137 

 Ruthven, A. G., 47, in, 206, 209, 

 210, 211 



Sacral hump, 30 

 Salamanders, 1, 2 

 Salientia, 2 

 Characters, 2 



Families, 2 



Number, 2 

 Salt marsh frog, 1, 52, 53 

 Saskatchewan, 205 

 Savanna cricket, 1, 80, 81, 98, 99 

 Savannah cricket frog, 80, 81 

 Say, T., 58 

 Say's toad, 58, 59 

 Scaphiopodidae, 2, 6, 8, 10, 14 

 Scaphiopus couchii, 1, 15,38,39,41, 61 

 Scaphiopus hammondii,4,g, 15,40,41 

 Scaphiopus holbrookii albus, 16, 43 

 Scaphiopus holbrookii holbrookii, 4, 5, 



7,9, 15, 16,41,42,43,44 

 Scaphiopus holbrookii hurterii, 15, 44, 



45 



Schmidt, F. J. W., 217 



Schmidt, K. P., 142, 143, 215, 217 



Schneider, J. G., 112 



Scientific name, 2, 3. See each species 



account 

 Scraper frog, 120, 121 

 Screaming frog, 1, 166, 167 

 Sensory lines. See lateral lines 

 Seton, E. T., 205 

 Shad frog, 2, 176, 177, 186, 187 

 Shannon, R. C, 107, 125 

 Shaw, G., 164 



Sherwood, W. L., 207, 212, 213 

 Shinn, Everett, 193 

 Shinn, Whittemore, 193 

 Sierra Madre yellow-legged frog, 32, 



158, 159 



Sierra Nevada yellow-legged frog, 



32, 160, 161 

 Simpson, S. E. R., 205 

 Size, 3, 4. See each species account 

 Slevin, Joseph, 136, 157, 204, 206, 



208, 212, 214, 216, 217 

 Small, H. B., 205 

 Small-spaded toad, 50, 51 

 Smith, D. S. C. H., 210 

 Smith, E., 207 

 Smith, H. M., 196 

 Smith, W. H., 210, 213 

 Snake frog, 148, 149 



228 



