1. GERRHONOTUS. 269 
millim. millim. 
Total length ...... 234 Fore limb........ 26 
Head) sh..ccueies 23 Hind limb........ 34 
Width of head .... 18 Deal, sins jetlsoe gcisesiads 138 
Body? sscedissncngines 73 
Ouxaca, 
a,b. 3 & yg. Oaxaca. (Types.) 
2. Gerrhonotus gramineus. 
Gerrhonotus gramineus, Cope, Proc. Ac. Philad. 1864, p.179; Giinth, 
Biol. C.-Am., Rept. p. 36, pl. xxiv. fig. B. 
Very closely allied to the preceding species, from which it differs 
in the following points:—Sides of neck covered with small equal 
subgranular scales; a slight fold from the ear to the fore limb. 
Lateral fold stronger, enclosing granular scales. Dorsal scales in 
twelve or thirteen longitudinal series, very indistinctly keeled. 
Ventrals in twelve longitudinal series; two ventral series corre- 
spond to one dorsal. Eleven upper labials, eleventh forming with 
the lower temporals an obliquely ascending series of five shields. 
Pea-green above, each transverse series of dorsal scales black at the 
base; lower surface of the head yellowish-white, of body pale 
green. 
Orizaba. 
u. 3, not good state. Orizaba. 
3. Gerrhonotus deppii. 
Abronia deppii, Gray, Cat. p. 53. 
Gerrhonotus deppii, Wiegm. Isis, 1828, p. 879, and Herp, Mex. p. 31, 
pl. ix. fig. 2; Dum. § Bibr. v. p. 398. 
Abronia deppii, Gray, Ann. N. H. i. 1838, p. 389, 
Gerrhonotus (Abronia) deppii, Bocourt, Miss. Sc. Mex., Rept. p. 325, 
pl. xxi. a. fig. 3. 
Head very distinct from neck; head-shields smooth; a pair of 
small shields behind the rostral ; five preefrontals, the central a 
little smaller and completely enclosed between the others; nasal 
separated from the rostral; a small supranasal; two small super- 
posed postnasals and two loreals, second largest; four small outer 
supraoculars ; frontal touching the interparietal ; ten upper labials, 
last two much larger than the others, and than the temporals. Sides 
of neck covered with granular scales. Lateral fold feeble, com- 
mencing in advance of the arm. Nuchal scales in six longitudinal 
series. Dorsal scales in ten or eleven longitudinal series (thirteen 
or fourteen in the middle of the body), oblique, much larger than 
ventrals, smooth; twenty-seven transverse series. Ventrals in 
thirteen or fourteen longitudinal series. Limbs short. Tail a little 
longer than head and body; caudal scales smooth. Dark brown 
above, with yellow spots forming transverse bands on the body, 
limbs, and tail; lips and lower surfaces yellowish white. 
