4. HYLA. 369 



equals the diameter of the hitter ; loreal region oblique, concave ; 

 canthus rostralis strong!}- marked, with a slight point or ridge at a 

 small distance from the orbit ; crown concave in the adult ; inter- 

 orbital space much broader than the upper eyelid; tj-mpanum very 

 distinct, about two thirds the diameter of the eye. Fingers slightly 

 webbed ; no projecting rudiment of pollex ; toes two-thirds webbed ; 

 disks of fingers nearly as large as the tymj^auum, of toes smaller ; 

 subarticular tubercles well developed ; a slight fold along the inner 

 edge of the tarsus. The hind limb being carried forwards along 

 the body, the tibio-tarsal articulation reaches between the eye and 

 the tip of the snout. Upper surfaces smooth or tubercular ; lower 

 surfaces granulate ; a fold above the tympainim. Greyish or olive 

 above, spotted or marked with darker ; hinder side of thighs reti- 

 culated with blackish ; beneath whitish, immaculate. Male with 

 two external vocal vesicles, each being situated near the angle of 

 the mouth ; during the breeding-season the inner side of the first 

 finger covered with blackish rugosities. From snout to vent 75 

 millim. 

 W. Indies. 



Zoological Society [P.J. 



38. Hyla ovata. 



Trachycephalus dominicensis, part., Giinth. Cut. p. 118. 

 Trachycephalus ovatus, Cope, Proc. Ac. Philacl. 1803, p. 44. 



Tongue subeircular, entire or scarcely emarginate, and slightly 

 free behind. Yomerine teeth between the rather large choante, in 

 two straight or slightly arched series. Head moderate, as long as 

 broad ; derm of head involved in the rugose cranial ossification ; 

 posterior outline of casque nearly straight ; snout rounded, once 

 and a half or once and one third as long as the diameter of the 

 orbit ; the distance between the nostril and the eye equals the 

 diameter of the latter ; loreal region oblique, concave : canthus 

 rostralis strongly marked ; crown concave in the adult ; interorbital 

 space much broader than the up])er eyelid ; tympanum very distinct, 

 about two thirds the diameter of the eye. Three outer fingers 

 nearly half webbed ; no projecting rudiment of pollex ; toes three- 

 fourths webbed ; disks of fingers as large as the tympanum, of toes 

 smaller ; subarticular tubercles well developed ; a slight fold along 

 the inner edge of the tarsus. The hind limb being carried forwards 

 along the body, the tibio-tarsal articulation reaches the front of the 

 eye, the tip of the snout, or between these two points. Upper 

 surfaces smooth or sparsely tuberculous ; beneath granulate ; a fold 

 above the tympanum. Brown above, variegated with darker; 

 beneath whitish, immaculate. From snout to vout 72 millim. 



W. Indies. 



2 B 



