422 HYLID. 
Vomerine teeth. Tympanum distinct. Fingers free; toes webbed, 
the tips dilated into large disks. Outer metatarsals united. Omo- 
sternum cartilaginous ; sternum a cartilaginous plate. Diapophyses 
of sacral vertebra moderately dilated. 
Ecuador. 
The erect pupil distinguishes this genus from Myla, and the 
adherence of the tongue in nearly its whole extent from Agalychnis. 
1. Nyctimantis rugiceps. (Prare XXVIII. fig. 2.) 
Vomerine teeth in two strong series on a level with the hinder 
edge of the large choane, forming a very open chevron, the point . 
of which is turned forwards. Head large, rough, the derm being 
involved in the cranial ossification ; snout rounded, twice as long as 
the diameter of the eye; loreal region very oblique, scarcely con- 
cave; canthus rostralis distinct; interorbital space broader than 
the upper eyelid; tympanum very distinct, two thirds the diameter 
of the eye. Fingers free, toes two-thirds webbed ; disks smaller 
than the tympanum; subarticular tubercles not much developed. 
The hind limb being carried forwards along the body, the tibio- 
tarsal articulation reaches between the eye and the tip of the snout. 
Skin smooth above, granulate beneath. Light olive-grey or brownish 
above, dark chestnut-brown on the sides and beneath, the two 
colours sharply defined ; back and upper surface of tibie generally 
rather indistinctly dotted with brown; generally one or two chest- 
nut-brown spots on the back; upper lip white-margined; a broad 
whitish streak on each side of the body, beginning a short distance 
from the arm and ending a short distance from the thigh; this 
streak may be broken up into spots. Male with an internal sub- 
gular vocal sac. From snout to vent 70 millim. 
Ecuador. 
a. 3. Ecuador. Mr. Buckley [ C.]. 
b-d. SQ. Canelos. Mr. Buckley [C. ]. 
8. AGALYCHNIS. 
Agalychnis, Cope, Proc. Ac. Philad. 1865, p. 194, and Nat. Hist. Rev. 
1865, p. 110. 
Agalychnis, part., Cope, Journ. Ac, Philad. (2) vi. 1866, p. 86. 
Pupil erect. Tongue oval, extensively free behind, slightly nicked. 
Vomerine teeth. Tympanum distinct. Fingers and toes webbed, 
the tips dilated into large disks. Outer metatarsals united. Omo- 
sternum cartilaginous ; sternum a cartilaginous plate. Diapophyses 
of sacral vertebra strongly dilated. 
C. America. 
1. Agalychnis moreletii. 
Hyla moreletii, A. Dum. Ann. Sc. Nat. (3) xix. 1853, p. 169; 
