364 HYLID®. 
29. Hyla langsdorffii. 
Hyla langsdorffii, Dum. § Bebr. p. 557. 
Osteocephalus langsdorflii, Cope, Jowrn. Ac. Philad. (2) vi. 1867, 
p. 200. 
Tongue oval, entire, scarcely free behind. Vomerine teeth in 
two arched series, the convexity of which is turned forwards, between 
the very large choanee. 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 foriuing 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 98 millim. 
Brazil. 
30. Hyla planiceps. 
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 choanve. 
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 webbed. The hind limb being carried forwards along 
the body, the tibio-tarsal articulation reaches a little beyond the tip 
of the snout. Back minutely tubercular, belly and sides coarsely 
areolate; a short tubercular fold from orbit to behind scapula. 
Above uniform dark brown; alight 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 60 millim. 
Nauta, Upper Amazon. 
31. Hyla venulosa. 
Hyla lichenosa, part., Giinth. Cat. p. 102. 
Hyla venulosa, Giinth. Cat. p. 104. 
Merian, Ins. Surin. t. 56; Seba, i. t.'71, f: 1 & 2, & t. 72. £. 4. 
Rana venulosa, Laur, Syn. Rept. p. 31. 
