49. sceLoporvs. 217 
a. Dorsal scales forming parallel longitudinal lines. 
a. Occipital broader than the parietals. 
* Less than 50 scales on the middle of the back between 
the occipital shield and the base of the tail. 
t The distance between the fifth toe and the ex- 
tremity of the fourth not exceeding that between 
the end of the snout and the posterior border of 
the ear. 
Less than 40 scales on a line between occipitai 
and tail; 5 to 7 dorsal scales correspond 
to the length of the shielded part of the 
UNG Rene ee reer ee ee eee 1. torquatus, p. 219. 
More than 40 scales between occipital and 
tail; 9 or 10 correspond to the length of [p. 229. 
the shielded part of the head .......... 12. consobrinus, 
tr The distance between the fifth toe and the ex- 
tremity of the fourth exceeds that betwecn the 
end of the snout and the posterior border of the 
ear. 
t More than 30 scales between the occipital and 
the base of the tail; 7 to 10 scales correspond 
to the length of the shielded part of the head. 
Dorsal scales strongly keeled and mucronate; 
head-shields constantly smooth........ 4, formosus, p. 222. 
Dorsal scales strongly keeled, moderately or 
shortly mucronate; head-shields fre- 
quently rugose or striated ............ 11. undulatus, p. 227. 
Dorsal scales weakly keeled, shortly mucro- 
nate ; head-shields smooth .......... 5. yarrovit, p. 223. 
tt Not more than 30 scales between the occipital 
and the tail; 5 or 6 scales correspond to the 
length of the shielded part of the head. 
Tibia as long as the shielded part of the 
heady 4.52 get eiw ead et cid ee ae 3. acanthinus, p. 221. 
Tibia longer than the shielded part of the 
Heads nedemawas lasagt econ ge Mechs 10. spinosus, p. 226. 
** 50 or more scales between the occipital and the tail. 
Dorsal scales in about 64 transverse series, 
with but slight carination, mucronation 
and denticulation .................. 6. ornatus, p. 224. 
Dorsal scales in 50 to 56 transverse series, 
simply pointed, not denticulated ...... 13. gratiosus, p. 230, 
Dorsal scales in about 80 transverse series. 14. couchit, p. 231. 
