268 ANGUID. 
a. Dorsal scales obtusely keeled. 
Six or eight median dorsal series keeled.. 12. kingzwt, p. 274. 
Three or four median series keeled...... 18. monticola, p. 278. 
b. Dorsal scales strongly keeled... 18. liocephalus, p. 275. 
c. Dorsal scales smooth. 
Dorsal scales in 10 or 12 longitudinal 
BOLLOS: saisars ecadgiesstitecs Sue ava gceitne’ ated als 14. modestus, p. 276. 
Dorsal scales in 16 or 18 longitudinal 
BORIOS? 2% ereitcleti sci el csicteps wun siece 15. rhombifer, p. 276. 
2. No azygos prefrontal. 
Dorsal scales in 14 longitudinal series .. 16. antauges, p. 277. 
3. An azygos prefrontal, in contact with the frontal. 
Dorsal scales in 14 longitudinal series .. 17. obscurus, p. 277. 
Dorsal scales in 18 or 20 longitudinal 
BETIOS’ 34 a awewne ecida wa es Get ee eke 19. moreletii, p. 278. 
1. Gerrhonotus oaxace. 
Gerrhonotus (Abronia) gramineus (non Cope), Bocourt, Miss. Sc. 
Mex., Rept. p. 330, pl. xxvi. a. fig. 6. 
—— oaxace, Giinth. Biol. C.-Amer., Rept. p. 36, pl. xxiv. fig. A. 
Head very distinct from neck; head-shields thick and rough in 
the adult, convex on the temples; a pair of small shields behind 
the rostral; five prefrontals, the central smallest and completely 
enclosed between the others; nasal separated from the rostral; a 
small supranasal ; two small superposed postnasals and two loreals, 
second largest ; four small outer supraoculars; frontal in contact 
with the interparietal ; ten upper labials, tenth largest and forming 
with the lower temporals a regular obliquely ascending series of 
four shields. Sides of neck covered with large irregular scales, 
separated from the nuchal shields by a naked space with a few 
scattered tubercular scales; no fold on the side of the neck. Gular 
scales larger than ventrals. Lateral fold very weak, without any 
granular zone. Nuchal scales in four longitudinal series. Dorsal 
scales in sixteen longitudinal series, the outer small and irregular, 
much larger than the ventrals, obliquely quadrangular, the eight or 
ten median series obtusely keeled (almost perfectly smooth in the 
young); twenty-seven transverse series from the head to the base 
of the tail. Ventrals in fourteen longitudinal series ; three ventral 
transverse series correspond to two dorsals. The adpressed fore 
limb reaches the eye; the length of the hind limb equals two thirds 
the distance from axilla to groin. Tail not twice as long as head 
and body, round, subquadrangular at the base; upper caudal 
scales very obtusely keeled. Olive above, greenish-white inferiorly ; 
young whitish with metallic gloss, with irregular transverse dark 
olive bands on the body, limbs, and tail. 
