60 BATRACHIA, 



to a greater or lesser degree. In a systematic work it might be well 

 to arrange in one group such as have the fingers entirely free, and in 

 another group those in which they are webbed. 



HYLA REGILLA, B. & G. 

 (Plate III, figs.18-18.) 



CAB. SPEC.' Denies vomerini in acervos duos orl/iculatos collocantur. 

 Palmarum digitis liberis, plantarum semipalmatis. Cute tubercu- 

 losa superne, inferne glandulosa. Colore viridi ad luteum vergente ; 

 maculis vel vittis fuscis corpore dispersis. 



SPEC. CHAR. Vomerine teeth disposed upon two circular groups. 

 Fingers free. Toes semipalmated. Skin above, tuberculous ; 

 beneath, glandulous. Green, with orange reflections ; maculated 

 or banded with blackish-brown. 



STN. Ilyla regilla, B. & G. in Proe. Acad. Nat. Sci. Philad. VI, 1852, 174; et 

 1853, 301. 



Hyla scapularis, HALLOW, in Proc. Acad. Nat. Sci. Philad. VI, 1852, 183. 



OBSERV. Amongst the numerous specimens before us, the one 

 represented in figure 13 is the largest ; and, according to all probabili- 

 ties, illustrates the fullest dimensions of this species. 



DESCR. The head is subtriangular, nearly as long as broad ; the 

 snout is subtruncated, slightly declivous, with a quite prominent can- 

 thus rostralis. Its upper surface is nearly plane, or slightly subcon- 

 cave. The space between the nostril and the eye is slightly concave 

 also. The nostrils occupy the highest part of the snout, being much 

 nearer its extremity than the anterior rim of the orbit. The eyes are 

 prominent and large, circular, and elevated above the surface of the 

 head. The tympanum is subelliptical ; its diameter is half that of 

 the eye. The tongue is broad, subelliptical, and but slightly notched 

 posteriorly. The maxillary teeth are very minute, and invisible to 

 the naked eye, especially on the lower jaw. The palatine teeth form 

 two small and circular groups situated between the inner nostrils, 

 and as far apart from the latter as the space between them. The 



