Mr. G. A. Boulenger on new Batrachians. 277 



Hyla ocelUfera. (PI. XH. fig. 4.) 



Toiii^ue circular, entire, slightly free behind. Vomerine 

 teeth in two round groups close together between the choanse. 

 Head much depressed, broader than long ; snout rounded, 

 shorter than tlie diameter of the orbit ; canthus rostralis in- 

 distinct; lorcal region very oblique, slightly concave ; nostril 

 nearer the tip of the snout than the eye; eye very large and 

 prominent ; upper eyelid rather narrow, narrower than the 

 interorbital space j tympanum distinct, hardly one third the 

 diameter of the eye. Outer fingers broadly webbed, the web 

 reaching the penultimate joint of the third finger and the disk 

 of the fourth ; toes nearly entirely webbed ; disks a little 

 larger than the tympanum. The tibio-tarsal articulation 

 reaches the tip of the snout ; tibia half the length of head 

 and body. Skin smooth, areolate on the belly and under the 

 thighs. Bluish grey above, dotted with black ; one or two 

 small white black-edged ocelli on each scapular region ; thigh 

 colourless, except a very narrow streak of bluish grey along 

 its upper surface; arms, hands, and feet colourless; lower 

 parts white. 



From snout to vent 28 millim. 



A single specimen from Paramba, N.W. Ecuador. 



Apparently nearest allied to H. sordida^ Ptrs. 



I avail myself of this opportunity to change the name 

 HyJa microcejjhala, Blgr. (P. Z. S. 1898, p. 481) nee Cope 

 (Proc. Amer. Phil. Soc. xxiii. 1886, p. 281), to //. Under- 

 woodi. 



EXPLANATION OF THE PLATES. 

 Plate XL 



Fig. 1. Rana larutensis, p. :?73. 



Fiy. 1 a. Ditto. Open mouth. 



Fig. 2. Rappia phantastica, p. 274. 



Fig. 3. Fhyllohates Pi-atti, p. 274. 



Fig. 4. Dendrobates opisthomelas, p. 275. 



Plate XII. 



Fig. 1. Mia-ohyla leucostig^na, p. 275. 

 Fig. 2. Bufo gt-acilipes, p. 270. 

 Fig. 3. Hyla picturata, p. 276. 

 Fig. 3 a. Ditto. Open mouth. 

 Fig. 4. Hyla ocelli/era, p. 277. 



