1. LEPIDOPHYMA.—2,. XANTUSIA. 327 
labials, sixth largest; mental large, triangular; four large lower 
labials, the two anterior forming a suture with their fellows on the 
median line. ‘Throat irregularly folded; one or two transverse 
gular folds; gular scales uniform, granular. Body depressed; 
nuchal and dorsal scales irregular, granular, intermixed with tri- 
hedral or subconical tubercles forming a regular longitudinal series 
on each side of the vertebral line, and more or less regular transverse 
series on the sides; the size of these tubercles very variable. 
Ventral scales quadrangular, forming ten longitudinal and about 
thirty transverse series. Four or more enlarged preanal scales. 
Limbs well developed, the hind ones not reaching the axil when 
extended, scaled like the body ; digits slender, compressed, bent at 
the articulations. Three (@Q ) to sixteen ( ¢ ) femoral pores on each 
side. Tail cylindrical, tapering, covered with rings of smaller and 
larger keeled scales ; when intact, its length a little exceeds that of 
head and body. Brown above, with darker brown and yellowish 
spots on the body and limbs; lips with vertical dark brown bars ; 
lower surfaces yellowish or brownish white. 
millim. millim 
Total length ...... 235 Fore limb... ...... 30 
G8 ys sain eke 23 Hind limb........ 43 
Width of head .... 16 Tail iy as Sh zradiate 185 
Body aie sy aceeiok rer 
Panama; Guatemala; South-western Mexico. 
a. 9. Isthmus of Tehuantepec. Brussels Museum [E.]. 
b-e, Her. Mexico. M. Sallé [C.]. 
f. Yg. Mexico. 
g. o. P Sir A. Smith [P.]. (Type 
of Porindogaster grayit.) 
2. XANTUSIA. 
Xantusia, Baird, Proc. Ac. Philad, 1858, p. 255; Cope, Proc. Ac. 
Philad. 1883, p. 30. 
A series of small supracculars, separating the supraciliaries from 
the frontals ; latter two, forming a longitudinal suture ; frontopari- 
etals large, separating the interparietal from the temporals. Dorsal 
scales uniformly granular. A sevies of slightly enlarged scales on 
the gular fold. 
California. 
1. Xantusia vigilis. 
Xantusia vigilis, Baird, 1. ¢. 
Three folds on the throat, the anterior connecting the ears infe- 
riorly and encircling the head. The adpressed hind limb reaches 
the first gular fold; its length is contained about twice and three 
