3G4 



HYLID.E. 



29. Hyla langsdorffii. 



Hyla langsdorffii, Dum. 8,- Bihr. p. 557. 



Osteocepiialus langsdorffii, Cope, Juurn. Ac, Philad. (2) vi. 1867, 

 p. 200. 



Tongue oval, entire, scarcelj' free behind. Vomerine teeth in 

 two arched series, the convexity of which is turned forwards, between 

 the very large choanre. Head large, depressed ; snout rounded ; 

 loreal regions concave ; canthus rostralis distinct, rounded, with 

 small pits and prominences ; crown concave, the borders of the 

 fronto-parietals forming two prominent ridges, which unite on the 

 occiput ; tympanum very distinct, three fourths the diameter of 

 the eye. Three outer fingers nearly entirely webbed, the two last 

 phalanges of third free ; toes entirely webbed. Upper surfaces 

 covered with very small conical tubercles ; lower surface granulate ; 

 a denticulated fringe along the outer edge of the forearm and fourth 

 finger and of the tarsus and fifth toe. Upper surfaces marbled with 

 grey, whitish, light brown, and dark brown ; limbs with large black 

 spots, transversely dilated ; white beneath ; a large black spot be- 

 neath the vent, and reticulations of the same on each side. From 

 snout to vent 1)8 millim. 



Brazil. 



30. Hyla plaiiiceps. 



Osteocephalus planiceps, Cope, Proc. Ac, Philad. 1874, p. 122. 



Tongue oval, adherent. Vomerine teeth in two curved transverse 

 series between the posterior portions of the very large choante. 

 Head broad and plane on the upper surface to the straight and 

 rectangular canthus rostralis ; loreal region nearly vertical ; upper 

 surface of skull rugose with ossific deposit, which nowhere penetrates 

 the free derm ; the lateral margins of the fronto-parietals indicated 

 by delicate angular ridges ; the diameter of the eye equals the space 

 between it and the nostril ; tympanum three fourths the diameter 

 of the eye. Fingers free ; no projecting rudiment of pollex ; toes 

 three-fourths we])bed. Tlie hind limb being carried forwards along 

 the body, the tibio-tarsal articulation reaches a little beyond the tip 

 of the snout. Eack minutely tubercular, belly and sides coarsely 

 areolate ; a short tubercular fold from orbit to behind scapida. 

 Above uniform dark brown ; a light border to the upper lip, and 

 a lighter line from the orbit to the angle of the mouth ; dermal 

 scapular fold pale -edged ; femur and tibia with dark cross bands on 

 the exposed surfaces. From snout to vent GO millim. 



Nauta, Upper Amazon. 



31. Hyla venulosa. 



Hyla lichenosa, part., G'dnth. Cat. p. 102. 



Hyla veinilosa, (rihith. Cat. p. 104. 

 Merian, Ins. Surin. t. 50 ; Seha, i. t. 71, f. 1 & 2, & t. 72. f. 4. 

 Rana venulosa, Laur. Syit-. Pepf. p. 31. 



