MEXICAN HERPETOLOGICAL MISCELLANY—SMITH 375 
rostral; frontonasal in contact with anterior loreal; three prefrontals, 
the median slightly smaller than others and narrowly separated from 
_frontonasal; two frontals, their median suture less than half their 
_maximum length; interparietal hexagonal, longer than and as large 
as either parietal; temporals three, the anterior and posterior sub- 
equal in size and less than a fourth size of parietals; median tem- 
poral a little larger than or subequal to a parietal, very narrowly 
separated from frontal; two nasals, the nostril pierced in anterior; 
two loreals, the anterior not quite two-thirds size of posterior; two 
preoculars, lower larger, triangular; three suboculars, three postocu- 
lars and three superciliaries, all small; eight supralabials, the fifth 
below middle of eye; granular temporals a little larger than nuchals, 
somewhat irregular in size, becoming larger anteriorly; a row of 
small auricular lobules bordering ear. 
A large mental, with a considerably larger labial border than 
rostral; three large pairs of scales (chinshields) following mental, 
the first two in contact, the posterior separated by about four scales 
(three to five) ; gular scales small, rounded, not imbricating, becom- 
ing flat and a little larger anteriorly; a rather well defined gular fold 
preceding arms, terminating on sides of neck, ventrally involving 
smaller scales than occur anteriorly. 
Sides and back with small, nonimbricating scales of nearly equal 
size, most conical or bluntly keeled; four or five middorsal rows of 
small, uniform granules, bordered on either side by a series of rather 
widely spaced, somewhat enlarged scales separated from each other 
generally by two scales; on dorsolateral surface are similar, scat- 
tered, slightly enlarged scales; sides with granules of uniform size. 
Thirty-two transverse rows of enlarged, flat, juxtaposed, ventral 
scales from gular fold to anus; 10 longitudinal rows of ventrals at 
middle of belly; 4 large, subequal preanals, and in addition the 
posterior pair bordered on either side by a scale half as large. 
Dorsal surface of foreleg with small, conical tubercles, smaller on 
lower foreleg; ventral surface similarly protected, except that the 
smaller scales are on the upper foreleg, the large on the lower; lamel- 
lar formula for fingers 10-15-15-10-7. 
Dorsal surface of thigh with nearly uniform, conical tubercles, 
shank with scales of irregular size, the larger ones bluntly keeled; 
ventral surface of hind leg with flat scales, largest anteriorly on 
shank; femoral pores 10-10; the pore series terminating medially at 
a large, flat scale; lamellar formula for toes 16-23-18-12-8. 
Dorsal caudals feebly keeled, subcaudals smooth; on dorsal surface, 
every third whorl of scales slightly enlarged; first whorl of each 
caudal segment (i. e., that which follows the whorl of enlarged 
scales) incomplete ventrally. 
