4 SYNOPSES AND DESCRIPTIONS. 
between it and the rostral; third extending obliquely backward beneath 
the ocular, with which it is in contact at the angle. The triangular inter- 
nasals are widely separated by the rostral. Below the internasal, a small 
rhomboid plate rests in a notch between the second and third labials, and 
behind this plate lies the small preocular. 
Seales small, hinder margin rounded, in 22 rows, similar above and 
beneath. Silvery brown, snout and lips light yellow. Hab. Panama and 
northward, 
ANOMALEPIS Jan, 
Teeth on the upper jaw. Rostral plate narrow, hardly reaching the top 
of the head. Nasal grooved behind the nostril. Head with large plates 
on the crown. Labials two, Scales smooth, lustrous, small in the ventral 
rows. Anal divided. 
ANOMALEPIS MEXICANUS. 
Jan, 1861, Icon. Gén. Ophid., Livr. I, pl. V. 
Body long, slender, subeylindrical; head indistinct; tail very short, 
bluntly rounded on the end. Muzzle broad, rounded. Mouth inferior, 
outline not regularly curved. Eyes visible through tke ocular. Rostral 
narrow, scarcely reaching the top of the head. A pair of broad frontals. 
Frontal shield-shaped, nearly as broad as long. Supraoculars larger than 
the ocular. Ocular smaller than the preocular. Nasal with a groove 
behind the nostril. Loreal larger than the first labial. Labials two, an- 
terior small, quadrangular; posterior larger, separated from the preocular 
by a narrow, elongate plate, and from the ocular by another that is similar 
but shorter. Lower labials five, small. The scales in contact with the 
head shields are larger than those farther back. Scales small, smooth, 
lossy, those of the belly not larger. Anal bifid. 
Color reddish-brown, very light below. A yellowish-white border on the 
scales produces the appearance of reticulations., (From Jan.) Hab. Mex. 
Srenostoma Wagler. 
Body slender, cylindrical; tail short. Muzzle large, extending beyond 
the lower jaw. Mouth inferior. Teeth on the lower jaw (3-5). Eye 
visible through the ocular. Nostrils anterior. Nasal grooved or divided. 
Rostral large, reaching backward on the top of the head. Ocular large. 
