238 Mr. G. A. Boulengev on 



2. Hiscodeles, n. n., for three species from the Solomon 

 Islands which differ from the preceding in the presence of a 

 horseshoe-shaped groove on the terminal discs of the toes, or 

 of the fingers also, which are thus divided into an upper and 

 a lower portion, the latter forming a more or less adhesive 

 pad, and in the web between the toes not penetrating far 

 between the outer metatarsals*. 



3. Ilylorana, Tschudi, agreeing with the preceding in the 

 groove on the digital discs, but differing in the outer meta- 

 tarsals being separated nearly to the base. Five species are 

 referred to this subgenus t« 



Synopsis of the Species. 



I. Hana. 



Vomerine teeth behind the level of the ehoanse, in long and strong 

 oblique series ; bead a little broader than long ; cauthus rostralis 

 very obtuse ; tympanum i to § diameter of eye ; first finger much 

 longer than second ; tibio-tarsal articulation reaching the eye ; 

 heels meeting when the limbs are folded at right angles to the 

 body ; tibia a little over 2 to 2^ times in length from snout to 

 vent ; toes with the tips dilated into small discs, webbed to the 

 discs; no glandular dorso-lateral fold ; nasal bones large and in 

 contact with each other and with the frontoparietals ; omosternum 

 forked at the base ; male without secondary sexual characters. 



1. H. grunniens, Daud. 



II. Discodeles. 



Vomerine teeth behind the level of the choanae, in short and strong 

 series ; tongue with an obtuse papilla in the middle ; head broader 

 than long; canthus rostralis obtuse; tympanum g to ^ diameter 

 of eye; toes with the tips dilated into small discs; glandular 

 dorso-lateral fold, if present, not confluent with the temporal ; 

 nasal bones large and in contact with each other and with the 

 frontoparietals ; omosternum forked at the base. 

 Vomerine teeth not extending outwards be- 

 yond the vertical of the inner edges of 

 the choanas ; fingers without discs, first 

 lunger than second; tibio-tarsal articu- 

 lation reaching the temple ; heels meet 

 or fail to meet ; tibia 2^ times in length 

 fj 0111 snout to vent ; toes § webbed ; 



* Several other species, from India (H. beddomii, Blgr., leithii, Blgr., 

 semipalmata, Blgr.), belong to this subgenus, which leads to Cornufer, 

 Tschudi. 



t it. hohti, Blgr., from the Loo Choo Islands, originally described as 

 allied to R. temporaries L., should be referred to Hylorana. On the 

 genus Bahina, Van Denburgh, which has been proposed for it, cf. C. R. 

 Ac. Sci. Paris, clxv. 1917, p. 989. 



