4 SYNOPSES AM) DESCBIPTIONS. 



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 vests in a notch between the second and third labials, and 

 behind this plate lies the small preocular. 



Scales small, hinder margin rounded, in 22 rows, similar above and 

 beneath. Silvery brown, snout and lips light yellow. Hub. Panama and 

 northward. 



ANOMALF.ris Jan, 

 Teeth on the upper jaw 7 . 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, /"'». Ii'i'n. Ophid., Lirr. I, pi. V. 



Body long, slender, subcylindrical ; head indistinct; tail very short, 

 bluntly rounded on the end. Muzzle broad, rounded. Mouth inferior, 

 outline not regularly curved. Eyes visible through the 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 live, small. The scales in contact with the 

 head shields are larger than those farther back. Scales small, smooth, 

 glossy, 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. 



Stexostoma 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. 



