SYNOPSES AND DESCRIPTIONS. 103 
GEOPHIS LATIFRONTALIS 2. Sp. 
Moderately stout, tapering slightly toward the head, belly broad; head 
not larger than the neck, depressed, snout broad, rounded, crown a little 
convex; tail stout, conical, short, near one eighth of the total. Eye very 
small. . Head-shields nine. Rostral broader than high, bent back in a 
blunt angle on the top of the snout. Internasals small. Prefrontals large, 
as broad as long, entering the orbit. Frontal short, broader than long. 
Supraoculars small, nearly as broad as long. Parietals large, about twice 
as long as broad. Nasal divided. Loreal and anteorbital united. One 
postorbital (two on one side, lower very small). Temporals 1+ 2, anterior 
large. Labials six, third and fourth in orbit, fifth largest, and separated 
from the parietals by a long temporal. Infralabials seven, fourth largest. 
Submentals two pairs, short, broad; posterior half as long as anterior, 
scale-like. Scales smooth, lustrous, in 17 rows, medial little longer than 
broad, outer broader than long. Ventrals 179, broad. Anal entire. Sub- 
caudals in two rows, 32 pairs. 
Back uniform dark plumbeous, tinged with purple; margins of scales 
lighter. Ventrals white, mottled with leaden to uniform leaden. Total 
length 15} inches; tail 1} inches. Found fifty miles south of San Luis 
Potosi, Mexico, by Dr. Edw. Palmer. 
GEOPHIS LIPPIENS. 
SymPuHotis Liprrens Cope, 1861, Pr. Ac. N. Se., Phil., 524. 
Body stout, tail blunt, hardly twice as long as the head, ending in a 
convex shield. Muzzle prominent, obtuse. Teeth equal, smooth. Eye 
very small. Rostral large. Prefrontals as broad as long. Frontal long, 
right-angled at each end. Supraciliary and upper postocular fused, the 
former as broad as the frontal. Loreal in orbit. One small preocular 
over the loreal. Nasal united with the labial. Labials five, last not so 
high as long. One temporal. Scales poreless, broader than long, in 19 
rows. Anal entire. Subcaudals bifid. 
Yellow, with eighteen black bands. A band covers the muzzle to behind 
the eyes; two are on the tail. Total length 202 inches. Guadalaxara, 
Mexico. (Cope.) 
