462 BULLETIN 120, UNITED STAlTES NATIONAL MUSEUM. 



0. terrae-mariae (Maryland). 



0. tria/ngulata (Florida). 



O. virgnloidea (North Carolina, Ohio). 



3, GULF COAST. 



Protoopalinae, none. 



Zelleriella intermedia cuneata (Brownsville, Texas). 



Opalina caroUnensis (District of Columbia to Florida, west to Ohio and 

 Texas). 

 0. obtrigonoidea orbiculata (Maryland to Florida, west to Texas). 



4, GREAT GRASSY PLAINS. 



Protoopalina mitotica (Nebraska). 



Cepedea cantabrigensis (Michigan, northwestward to Alaska and Great Slave 

 Lake). 



Opalina kcnnicotti (northern Illinois). 



0. obtrigonoidea (Massachusetts to Georgia, westward to Arizona and 

 Mexico). 



5, ROCKY MOUNTAIN REGION. 



Protoopalina Jiammondii (Wyoming to Mexico). 

 P. scaphiopodos (Wyoming, Colorado). 

 Zelleriella [of Bufo tcoodhousi'] (Utah). 

 Opalina copei (Montana, Costa Rica). 



6. SONORAN REGION — ARID STATES AND NORTHERN MEXICO. 



Protoopalina mexicana (Mexico). 



P. ovoidea (Texas). 



Zelleriella couchii (Texas). 



Z. hirsuta (Arizona). 



Z. intermedia (Mexico). 



Z. intermedia cuneata (Brownsville, Texas). 



Cepedea mexicana (Matamoras, Mexico). 



C. species ?, from Hyla versicolor chrysoscelis (New Braunfels, Texas). 



Opalina discophrya (New Mexico). 



0. gigantea (Texas). 



0. oblanceolata (Arizona, northern Mexico). 



O. obtrigonoidea (Massachusetts to Georgia, west to Arizona and Mexico). 



O. spiralis (Texas, Arizona). 



0. virguloidea (Mexico). 



O. woodhousi (Arizona, Utah). 



O. species ?, from Hyla versicolor chrysoscelis (New Braunfels, Texas). 



7, PACIFIC COAST. 



Protoopalinae, none. 



Zelleriella ranaxena (southern California). 

 Z. [of Bufo punctatusl {southern California). 

 Cepedeae, none. 



Opalina draytonii (California, Lower California). 

 O. obtrigonoidea maxima (San Francisco, western Canada, Alaska). 

 O. obtrigonoidea lata (Oregon, Florida). 

 O. oregonensis (Oregon, Vancouver Island). 



O. virguloidea (San Francisco, south into Mexico, also Ohio to North Caro- 

 lina). 



