Bufo canorus Camp 182 
Bufo cognatus cognatus Say 187 
Bufo cognatus californicus Camp 192 
Bufo punctatus Baird and Girard 192 
Bufo woodhousii Girard 199 
Hyla arenicolor Cope 203 
Hyla regilla Baird and Girard 215 
Rana aurora aurora Baird and Girard 229 
Rana aurora draytonii Baird and Girard 231 
Rana boylii boylii Baird 245 
Rana boylii muscosa Camp 262 
Rana boylii sierrae Camp 263 
Rana pipiens Schreber 266 
Rana pretiosa pretiosa Baird and Girard 270 
Rana pretiosa luteiventris Thompson 274 
Introduced species 276 
Rana catesbeiana Shaw 276 
Summary 283 
Literature cited 288 
Explanation of Plates 304 
Index 000 
