422 HTLID^. 



Vomerine teeth. Tympanum distinct. Fingers free ; toes webbed, 

 tbe 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 Hyla, and the 

 adherence of the tongue in nearly its whole extent from Agalyehnis. 



1. Nyctimantis rugiceps. (Pxate XXVIII. fig. 2.) 



Vomerine teeth in two strong series on a level with the hinder 

 edge of the large choanse, 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 tibiae 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 mOlim. 



Ecuador. 



a. (J . Ecuador. Mr. Buckley [0.1. 



b-d. (S 2 ■ Oanelos. Mr. Buckley [C.J. 



8. AGALYCHNIS. 



Agalyehnis, Cope, Proo. Ac. Fliilad. 1865, p. 194, and Nat. Hist. Sev. 



1866, p. 110. 

 Agalyehnis, 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- 

 stemum cartilaginous ; sternum a cartilaginous plate. Diapophyses 

 of sacral vertebra strongly dilated. 



C. America. 



1. Agalyehnis moreletii. 

 Hyla moreletii, A. Bum, Ann. 8c. Nat, (3) xix. 1853, p. 169; 



