28 TTPHLOPID^. 



Icon. G&n. p. 10, 1. 4, pi. mi. fig. 1, & 1. 5, pis. v. & vi. %. 7 



(1864). 

 Argyrophis reticulatus, (??-oy, Cat. Liz. p. 137 (1845). 

 Ophthalmidion crassum, A. Bum. Cat. M6th. Mept. p. 202 (1861). 



Snout rounded; nostrils lateral. Eostral hardly one third the 

 width of the head, extending to the level of the eyes ; nasal incom- 

 pletely divided, the cleft proceeding from the second labial ; a prte- 

 ocular, a little narrower than the nasal or the ocular, in contact 

 with the second and third labials ; eyes distinct ; upper head-scales 

 slightly enlarged ; four upper labials. Diameter of body 22 to 30 

 times in the total length ; tail broader than long, ending in a spine. 

 20 scales round the body. Dark brown or black above, uniform or 

 the scales edged with lighter ; snout, tail, and lower parts yellowish. 



Total length 300 millim. 



Tropical South America. 



30. Typhlops tenuis. 



TypUops tenuis, Salvin, Proc. Zool. Soc. 1860, p. 454. 



— — perditus, Peters, Mon. Berl. Ac. 1869, p. 435 ; Bocmirt, Miss. 



Se. Mex., Kept. p. 499, pis. xxix. fig. 3, & xxx. fig. 3 (1882). 



basimaculatus, Cope, Proc. Ac. Pliilad. 1866, p. 820. 



prselongus, F. Muller, Verh. naturf. Ges. Basel, vii. 1885, 



p. 674. 



Snout rounded, very prominent ; nostrils lateral. Eostral about 

 one third the width of the head ; nostril between two nasals, the 

 anterior in contact with the first and second labials ; a praeocular, 

 as large as the ocular, in contact with the second and third labials ; 

 eyes hidden or just distinguishable ; upper head-scales scarcely 

 enlarged ; four upper labials. Diameter of body 60 to 62 times 

 in the total length ; tail as long as broad or a little broader than 

 long, ending in a spine. 18 scales round the body. Pale brown 

 above, yellowish inferiorly ; or yellowish, each dorsal scale with a 

 brown spot. 



Total length 310 millim. 



Central America. 



Esqrs. [P.]. 

 e-f, g. Ad. & hgr. Mexico. M. Sall6 [0.]. 



N 



