200 CYSTIGNATHIDJE. 



Tympanum one half the diameter of the 



eye : vomerine series not extending 



outwards beyond the external border 



of the choanfB : skin smooth 10. planirostris, p. 208. 



Tympanum one half the diameter of the 



eye ; vomerine scries not extending 



outwards beyond the external border 



of the choanal ; numerous glandular 



lines along \\\q back 17. hinotatm, p. 209. 



I>. Head broader than the body. 



Vomerine teeth in two curved series . . 18. ciineatns, p. 209. 



Tympanum large ; interorbital space 



plane, without ridges 10. laticejjs, p. 210. 



Tympanum one fourth the size of the 

 eye ; interorbital space plane, without 

 ridges 20. melamstictiis, p. 21 0. 



Tympanum as large as the eye; inter- 

 orbital space with crest-like lateral 

 ridges ; back with dermal folds .... 21. pelviadus, p. 210. 



Tympanum one third the diameter of 

 the eye ; interorbital space with crest- 

 like lateral ridges; back with dermal 

 folds 22. megacejyJialus, p. 211 . 



Tympanum one third the diameter of the 

 eye ; interorbital space with crest-like 

 lateral ridges ; back without dermal 

 folds 23. cjulosus, p. 211. 



2. Tympanum indistinct ; eustachian tubes minute. 

 Tibio-tarsal articulation reaching beyond 



the tip of the snout 24. diastema, p. 212. 



II Eelly slightly granular. 



No tympanic disk; eustachian tubes 



minute , 25. sunlm, p. 212. 



Tympanum distinct, small ; upper sur- 

 faces tubercular 26, fjlandulosm, p. 212. 



Tympaniim distinct, small ; fronto-pa- 



rietals concave, with prominent ridges 27. deviUii, p. 213. 



C. Belly granular. 



1. Head moderate. 



a. "Without serrated ridges. 



a. Vomerine teeth in a zigzag row across the palate. 



Disks moderate, transversely oval; head 



and body with granuliform warts .... 28. ricordii, p. 213. 

 Disks small ; skin smooth above 29. o,vyrhynchm, p. 213, 



