202 IGUANIDE, 
millim. millim. 
Total length (tail re- Body ag 45cmcn noes 109 
produced) ...... 300 Fore limb ........ 52 
Mead sco ed ce vate es 26 Hind limb........ 98 
Width of head .... 21 
Lower California to Arizona. 
ad. La Paz, California. Smithsonian Institution [P.]. 
42, SAUROMALUS. 
Sauromalus, 4, Dum. Arch, Mus. viii. p. 535; Cope, Proc. Ac. Philad. 
1864, p.177; Bocourt, Miss. Sc. Mex., Rept. p. 149. 
Euphryne, Baird, Proc. Ac. Philad. 1858, p. 253. 
Tympanum distinct. Body depressed; no dorsal crest; dorsal 
scales small. Upper head-scales small. A strong transverse gular 
fold; no gular pouch. Digits with tubercularly keeled lamelle 
inferiorly. A long series of femoral pores. Tail rather short, cylin- 
drical. Lateral teeth tricuspid; no pterygoid teeth (?). 
South-western North America. 
1. Sauromalus ater. 
Sauromalus ater, A. Dum.l. ¢. p. 536, pl. xxiii. fig. 3; Bocourt, 1. ce. 
pl. xvii. bis. fig. 11. 
Euphryne obesus, Buird, i.e. and U.S. Mex, Bound. Surv., Rept. 
pl. xxvii. 
Habit stout, head and body much depressed. Snout narrowed, 
obtuse ; nostril a little nearer the end of the snout than the orbit, 
directed upwards and slightly outwards; upper head-scales small, 
smooth, a little enlarged on the snout; occipital not enlarged ; 
labials small; four conical scales forming a strong denticulation on 
the anterior edge of the ear. Sides of neck strongly plicate, with 
some large conical scales. Flanks longitudinally plicate; a slight 
median groove along the back. Dorsal scales small, squarish, 
smooth, forming regular transverse series; flanks granulate; ventral 
scales smooth, a little smaller than dorsals. Limbs strong, covered 
with scales larger than those on the body ; they are smooth on the 
arms and thighs, tubercular on the forearms and legs ; digits short. 
Fourteen or fifteen femoral pores on each side. Tail scarcely longer 
than head and body, cylindrical, depressed at the base, covered with 
moderate-sized, equal, keeled, slightly spinose scales arranged in 
verticils. Yellowish brown or olive-green, head and limbs some- 
what lighter; back dotted with black, with five broad transverse bars 
in the ‘young. 
millim. millim. 
From snout to vent 128 Parl ses bia ee 132 
Head y.5 ksh ew eae 24 
Lower California and Sonora. 
