8. Lyeosoma, 213 
B. 22 to 34 scales round the body. 
* Frontonasal forming a suture with the frontal. 
t+ Caudal scales smooth. 
~ No regular nuchals; three or more pairs of scales 
bordering the parietals, 
Ear-opening as large as or a little smaller 
than the eye-opening ; 28 to 32 scales 
round the body ................., 9. tenue, p. 231. 
Ear-opening a little larger than the eye- 
opening ; 34 scales round the body .. 10. murrayt, p. 232. 
Har-opening smaller than the eye-open- 
ing ; snout much depressed ........ 11. pallidum, p. 233. 
, tf One or more pairs of large transverse nuchals. 
22 scales round the body ............ 12. minutum, p. 233. 
28 to 32 scales round the body; dorsals 
equal, laterals a little smaller ...... 13. tsolepis, p. 234. 
26 to 28 scales round the body; dorsals, 
especially the two vertebral. series, 
largest oo co aevce an nas ee rue 14. elegantulum, p. 235. 
tt Upper caudal scales obtusely keeled, the keels 
forming continuous lines. 
32 to 34 scales round the body, all 
SMOOK .aseisescesweeragesauade 16. fasciolatum, p. 236. 
28 to 30 scales round the body; dorsals 
obtusely unicarinate .............. 17. monotropis, p. 237. 
** Prefrontals in contact. 
Dorsal scales much larger than ventrals; 
prefrontals, inner angles in contact; 
interparietal smaller than fronto- 
Parte tals; isis feiss aie Pieiele kusca dunce Sank 20. rufum, p. 239. 
Dorsal scales much larger than ventrals ; 
prefrontals forming a median suture; 
interparietal as large as  fronto- 
Parietal ss aioe odie siete 4 ee aA 21. maindroni, p. 239. 
Dorsal and ventral scales subequal .... 22. consobrinwm, p. 240. 
y. 86 to 38 scales-round the body; frontonasal forming 
a suture with the frontal. 
Frontal in contact with the two anterior 
supraoculars, the first of which is at 
least twice as long as the second .... 28, jagorii, p. 240. 
Frontal in contact withthe three anterior __ 
supracculars, the first of which is not 
much longer than the second ...... 24, indicum, p. 241. 
