930 IGUANID®. 
Head-shields smooth; a series of four or five transversely dilated 
supraoculars, the widest not measuring more than half the width of 
the supraocular region; two canthal scales; occipital as long as 
broad, or a little longer than broad, larger than the parietals; ante- 
rior border of ear with a strong denticulation, formed of three or 
four large pointed scales. Dorsal scales larger than ventrals, strongly 
keeled, slightly mucronate, tricuspid, forming parallel longitudinal 
series ; forty-two to forty-four scales between the occipital shield 
and the base of the tail; nine or ten scales correspond to the length 
of the shielded part of the head; lateral scales keeled, directed ob- 
liquely upwards, a little smaller than dorsals; ventrals smooth, 
bi- or tricuspid; forty-two or forty-four scales round the middle of 
the body. The adpressed hind limb reaches the axilla or the cer- 
vical fold; tibia slightly shorter than the shielded part of the head ; 
the distance between the base of the fifth toe and the extremity of 
the fourth equals the distance between the end of the snout and the 
posterior border of the ear. Twelve to seventeen femoral pores. 
Caudal scales as large as, or a little larger than dorsals. Male with 
enlarged postanal scales. Reddish brown above, with a greyish 
vertebral band and one or two yellowish lateral bands on each side ; 
dark-brown spots between the longitudinal bands ; a blackish streak 
at base of humerus; lower surfaces yellowish white, uniform in 
the female ; male with a small blue spot on each side of the throat, 
and an elongate black-margined blue blotch on each side of the 
belly, the white interspace between them measuring twice their 
width. 
millim. millim 
Total length ... .. 136 Fore limb.. ..... 23 
Head sen, ene eer ae ea 14 Hind limb........ 34 
Width of head ... 11 Pea esis tat usps eine 79 
Body osdeasas sin de 43 
N. America, Mexico. 
a-c. 3 Q. Dacota. Zoological Society. 
(Types of S. garmani.) 
d. 3, bad state. Putla, Mexico. 
13. Sceloporus gratiosus. 
Sceloporus graciosus, Baird § Gir. Proc, Ac. Philad. 1852, p. 69, and 
wm Stansb. Exped. Gr. Salt Lake, p. 346, pl. v. figs. 1-8; Cope, 
Proc. Am. Philos, Soc. xxii. 1885, p. 895. 
gracilis, Baird § Gir. Proc. Ac. Philad. 1852, p. 175; Girard, 
U.S. Explor, Exped, Herp. p. 386, pl. xx. figs. 1-9; Bocourt, 
Miss. Sc. Mex., Rept. p. 190, pl. xviii. fig. 4. 
Head-shields smooth ; a series of feebly dilated transverse supra- 
oculars ; two canthal scales; occipital very large, as broad as long; 
parietals very small, two on each side; anterior border of ear with 
a strong denticulation, formed of four or five pointed scales, which 
are a little larger than those preceding. Dorsal scales larger than 
yentrals, keeled, sharply pointed, forming parallel longitudinal lines ; 
