RANID^.— LXXVII. 187 



Y. FAMILIES OF PROTEIDA. 



* Hind legs present; both jaws with teeth; form salamander-like. 



Proteid.^, 87. 



** Hind legs wanting ; upper jaw toothless; form eel-like. 



SlKENID^, 88. 



OEDEE W.-AS"UEA. 



{The Tailless Batrachians.) 

 Body nearly or quite naked, short and broad; all four 

 limbs present; tail wanting in the adult; young (tadpole) 

 fish-like, with broad head, external branchiae, a long tail, 

 no limbs and no teeth; the intestinal canal very long, 

 adapted for a vegetable diet; from this form by degrees 

 it develops into the adult animal which is always more 

 or less Frog-like. 



FAMILY LXXVIL — RANID^. 



{The Frogs) 

 Tailless Batrachians with the tonsrue adherent in front 

 and more or less free behind; fingers four, toes five, 

 both commonly webbed; ear well developed, jaw and 

 visually vomer, wnth teeth; chiefly aquatic. Genera 

 fourteen, species about fifty; very abundant in tropical 

 America. 



* Vomerine teeth present ; no finger opposed to the others ; tongue 



nicked behind ; toes full-webbed. . . Rana, 1. 



/. RANA, Limiaeus. Frogs. 



* Back with large distinct spots arranged in more or less regular 



rows ; back with two conspicuous yellowish folds. 



1. R. virescens, Kalm. I^eopard Frocj. Common 

 Frog. General color greenish, often bright, sometimes 

 brassy, with man}^ pale-edged dark spots which lie in 

 two irregular rows on back; usually two large spots 



