Tadpoles. — Eyes lateral or superior. Spiraculum sinistral. 

 Vent dextral, at some distance above the lower edge of the 

 subcaudal crest. Upper crest of tail not extending beyond 

 base of tail. Mouth normal; papillae absent along the upper 

 border of the upper lip; series of teeth 4 to 7/3. 



Distribution: Madagascar; E.- and S.E.-Asia ; western 

 part of the Indo-Australian Archipelago, including Celebes. 



Synopsis of the Species. 



A. Fingers free. Back with rough warts I. Rh. leprosus p. 244. 



B. Fingers webbed at the base. 



I. Tympanum more than half the width of 

 the eye. 



1. A bony crest above the tympanum. ... 2. Rh. otilophus p. 245. 



2. Head without crests. 



a. Tympanum smaller than the eye. 



a. Skin of the head coossified with the 



skull 3. Rh. leiicomystax p. 246, 249. 



|3. Skin of the head not ossified .... 4. Rh. colletli p. 250. 



£. Tympanum as large as the eye 5. Rh. macro/is p. 251. 



II. Tympanum not more than half the width 

 of the eye. 



1. The heel reaches a little beyond the tip 



of the snout, with a tubercle 6. Rh. everetti p. 251. 



2. The heel reaches far beyond the tip of 



the snout, with a tubercle 7. Rh. macroscelis p. 252. 



3. The heel reaches far beyond the tip of 



the snout, without tubercle 8. Rh. hosii p. 253. 



C. Fingers (at least the outer ones) '/ 3 webbed, or 

 more, the web not reaching disk of third finger. 



I. Head with four spine-like processes 9. Rh. georgii p. 253. 



II. Head smooth. 



1. Heel with dermal appendage. 



a. The heel reaches beyond the tip of the 



snout 10. Rh. javanus p. 254. 



b. The heel does not reach beyond the 

 tip of the snout. 



oc. Outer fingers '/ 3 webbed 11. Rh. appendkidatus p. 255. 



/3. Outer fingers '/ 2 webbed 12. Rh. poecilonotiis p. 256. 



y. Outer fingers about 2 / 3 webbed ... 13. Rh. bifasciatus p. 257. 



S. Fingers nearly entirely webbed ... 14. Rh. dulitensis p. 258. 



2. Heel without dermal appendage. 



