CLASSIFICATION OF VERTEBRATA 15 



2. Dendropliryniscidae. No maxillary teeth. Sacral 

 diapophyses not dilated. 



Peru. Two species only. 



3. Bufonidae. Maxillary teeth present. Sacral diapo- 

 physes dilated. Procoelous, no ribs. 



Terrestrial, arboreal, aquatic, burrowing. 



Bufo and several other genera. Bufo is cosmopolitan, 

 with the exception of the Australian region. 



Myobatrachus, one species, and Pseudophryne, two species, 

 are the only Australian representatives of this other- 

 wise cosmopolitan family. 



4. Hylidae. Upper jaw toothed. Sacral diapophyses dilated. 

 Terminal phalanges claw- shaped, swollen. 



Procoelous, no ribs. 

 Cosmopolitan. 



Acris. U.S.A. 



Hyla. Cosmopolitan, excluding Africa and Madagascar. 



Nototrema. Tropical America. 



5. AmphignatJiodontidae. Both jaws toothed. Sacral 

 diapophyses dilated. Closely allied to Hylidae. 



One species, in Ecuador. 



6. Pelobatidae. Upper jaw toothed. Sacral diapophyses 

 strongly dilated. No ribs. Terminal phalanges simple. Verte- 

 brae variable. 



Pelobates. Europe. 

 Pelodytes. W. Europe. 



Other small genera in North America, Central America, 

 India, Malaya, New Guinea, 



7. Discoglossidae. Upper jaw toothed. Sacral diapophyses 

 dilated. With short movable ribs. 



Opisthocoelous. In tadpoles the spiracle is placed mesially 

 on the thoracic region. 



Discoglossus. S. Europe and NW. Africa. 



Bombinator. Europe and Asia. 



Liopelma. New Zealand. [The only Amphibian in 



New Zealand.] 

 Alytes. Western Europe. 



8. Hemiphractidae. Both jaws toothed. Sacral diapo- 

 physes not dilated. Opisthocoelous. 



