45 



acutely pointed, crests high, convex, equally deep, the upper 

 one extending to above the spiraculum. 



Mouth ventral ; lips bordered with papillae, which are absent 

 in the middle of the upper lip; jaws narrowly edged with 

 black; series of teeth I'l 3, those of lower lip about equal 

 in length. 



Greyish white; back, throat and base of tail darkly marbled ; 

 tail further yellowish, with a few (usually 4 or 5) broad, black 

 vertical streaks ; a dark streak, bordered above and below by 

 a white one, from eye to tip of snout. Length 34 mm. 



It is not certain, if these tadpoles, found in a small swamp 

 near the lake Sentani, really belong to H. bicolor. 



Habitat: Aru islands; New Guinea (Idenburg riv. ! ; Moaif 

 riv. ! ; Humboldt bay ? ! ; Sentani lake ! ; Merauke !). — Australia. 



23. Hyla impura Ptrs. & Dor. 



Hyla impura Peters e Doria, Ann. Mus. Genova, XIII, 1878, p. 426, pi. VII, fig. 2. 

 By la impura Boulenger. Cat. Batr. Sal. Brit. Mus., 1882, p. 409. 

 Byla impura v. Mehely, Termesz. Fiizetek, XXI, 1898, p. 176. 

 Hyla impura v. Kampen, Zool. Jahrb., Syst., XXXVII, 1914, p. 368, 



Tongue suboval or subcircular, nicked and free behind ; 

 vomerine teeth in two transverse or slightly oblique groups 

 between the posterior borders of the choanae. Head as long 

 as broad; snout rounded, or somewhat pointed, as long as 

 the upper eyelid, longer than deep; canthus rostralis angular; 

 loreal region very oblique, concave ; nostril nearer the end 

 of the snout than the eye ; interorbital space as broad as, or 

 hardly broader than the upper eyelid ; tympanum distinct, '/^ 

 to ^r, *hs diameter of the eye. Disks of three outer fingers 

 half to nearly as large as the tympanum, of first finger much 

 smaller; disks of toes smaller than or as large as those of 

 fingers; first finger as long as second, or a little shorter; 

 second finger shorter than fourth ; fingers webbed at the base, 

 only a slight rudiment of web between first and second ones; 

 third and fifth toe equal in length ; toes nearly entirely webbed, 

 »the web reaching the disks of the third and fifth one, or 

 nearly so; two phalanges of fourth toe free; subarticular 

 tubercles and the oval inner metatarsal tubercle feebly developed, 

 a very feeble outer metatarsal tubercle ; the heel reaches 

 between eye and tip of snout, or a little beyond ; tibia half 

 the length of head and body, or a little longer. 



