SYNOPSES AND UESCKIPTIONS. 6 



Nasal small, rectangular, lialf as wide as the rostral at the moutli. Pre- 

 oculars twice as liigli as wide. Oculars smaller than the preoculars, 

 similar in sliape, C'rown-sliields small ; one pi-efrontal, one frontal, two 

 supraoculars, and two parietals. Scales small in 22 longitudinal rows; 

 transverse rows 512. 



Anterior portion of the head yellowish; body uniform ashy gray. Hab. 

 North America. (From descr.) 



Typhlops perditus. 



Peters, 1869, Mmiatsbericlite Bed. Akad., 435. 



Eyes invisible. Nostrils at the end of the snout. Head shields similar 

 to those of T. rdiculatus, except that the posterior margin of the naso- 

 rostral is much less concave and the preocular less bent forward. Scales 

 in 18 longitudinal rows. Dorsal scales olivaceous brown with yellowish- 

 green margins. Beneath and on the end of the snout greenish-yellow. 

 (From descr.) Said to be from Orizaba, Mexico. Total length 0"", 285; 

 tail 0", 004. 



Typhlops basimaculatus. 



Cope, 1866, Pr. Ac. N. Sc. Phil, 320. 



Body compressed posteriorly ; head depressed, muzzle from above rounded 

 truncate; tail narrowed, obtuse. Rostral narrow. Eye invisible, ocular 

 extending to labials. A preocular, little wider than ocular. Supralabials 

 four. Scales in 18 longitudinal rows. Yellow, scales of seven dorsal rows 

 with a large brown spot at the base. Top of head and end of tail immac- 

 ulate. Cordova and Orizaba, Mexico. (From descr.) 



Typhlops (Idiotyphlops) emunctus spec. nov. 

 Very long, slender, enlarging toward the tail; head not distinct from 

 the neck, slightly depressed, rounded, muzzle extending beyond the lower 

 jaw; tail not longer than the thickness of the body at the vent, rounded 

 to a point. Eye small, indistinct or invisible. Shields of the side of the 

 head small. Rostral large, bent far back on the head, lateral margins 

 concave, rather nai-row, widening toward the top of the head, followed by 

 two short, broad verticals, acute angled laterally, of which the posterior 

 is shorter. Nasal deeper than long, divided diagonally from end to end ; 

 nostril opening forward. Above the nasal a small plate has the form of a 

 spherical triangle with concave sides. Labials four; posterior scale-like; 

 anterior largest, beneath the nasal and extending forward in a long point 



