200 CYSTIGNATHID®. 
Tympanum one half the diameter of the 
eye; vomerine series not extending 
outwards beyond the external border 
of the choanz; skin smooth........ 16. planirostris, p. 208. 
Tympanum one half the diameter of the 
eye; vomerine series not extending 
outwards beyond the external border 
of the choane; numerous glandular 
linestalons the back <0 fg: «18 os 17. binotatus, p. 209. ©°* 
6, Head broader than the body. 
Vomerine teeth in two curved series .. 18. cuneatus, p. 209. 
Tympanum large; interorbital space 
plane, without ridges...........++. 19. laticeps, p. 210. 
Tympanum one fourth the size of the 
eye; interorbital space plane, without 
TIGER mma oi fr ates loa ss ee 20, melanostictus, p. 210. 
Tympanum as large as the eye; inter- 
orbital space with crest-like lateral 
ridges; back with dermal folds .... 21. pelviculus, p. 210. 
Tympanum one third the diameter of 
the eye; interorbital space with crest- 
like lateral ridges; back with dermal 
POLS) Seine ECs Ie cee | ke pice ede eS 22. megacephalus, p. 211. 
Tympanum one third the diameter of the 
eye; interorbital space with crest-like 
lateral ridges; back without dermal 
MIS chs tye iv s fot a eawhe casi ew apace a eees 23, gulosus, p. 211. 
2. Tympanum indistinct; eustachian tubes minute. 
Tibio-tarsal articulation reaching beyond 
thé tip of the snout ...............° 24. diastema, p. 212. 
\ 
*S B. Belly slightly granular. 
No tympanic disk; eustachian tubes 
MGNUULO 18s 2 opis lees dies wwe Sie a BGs oie SOs SURGUS. IDs aber 
Tympanum distinct, small; upper sur- 
faces tubercular ..............:5.. 26. glandulosus, p. 212; 
Tympanum distinct, small; fronto-pa- 
rietals concave, with prominent ridges 27. devillii, p. 218. 
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. 218. © ~~ 
Disks small ; skin smooth above ...... 29. owyrhynchus, p. 213, > 
