3. AMPUI-U-EXA. 441 



segments. Eight prseanal pores. White, the upper scales reddish 

 brown. 



Length to vent 280 millim. ; tail 34 millim. 



Brazil. 



6. Amphishaena leiicocephala. 



Amphisbfena leucocephala, Peters, Mon. Berl. Ac. 1878, p. 778, pi. — . 

 tig. 1 ; Strauch, Mel. Biol. Ac. tSt. Petersh. xi. p. ,'!84. 



A pair of occipitals, nearly as large as the frontals ; a small 

 fourth upper labial ; ten or twelve pra3anal pores. (Jtherwise I 

 cannot see any difference, from the descriptions, between this and 

 the preceding species. Two hundred and thirty-two or two hundred 

 and thirty-three aunuli on the body, twenty-nine or thirty on the tail. 



Bahia. 



7. Amphishsena mertensii. 



Amphisbsena mertensii, Strauch, Mel. Biol. Ac. St. Petersh, xi. 

 p. 385. 



The head-shields differ from those of the preceding species chiefly 

 in the presence of a pair of very large fronto-parietals, or occipitals, 

 each of which is as large as the two frontals taken together; no 

 intraocular ; three upper and as many lower labials. Two hundred 

 and twenty-nine anuuli on the body, and thirty-two on the tail ; 

 the segments of the annuli narrow, much longer than broad on the 

 dorsal surface, the two median ventral rows nearly twice as broad 

 as long ; an anuulus contains forty-four segments, twenty-four 

 above and twenty below the lateral lines. Latter distinct. Eight 

 anal segments. Seven praeanal pores. Yellowish brown, lighter 

 inferiorly. 



Length to vent 290 millim. ; tail 40 millim. 



S. America. 



8. Amphishsena vermicularis. 



Ampbisbfeua vermicularis, Gray, Cat. Tort. p. 71, 

 a)id Sh. Rcpt. ii. p. 35. 

 Amphishsena vermicularis, Wagl. in Spi.r, Serp. Bra><. p. 73, pi. xxv, 

 fig. 2 ; Dmn. l^- Bibr. v. p. 4cS9 ; liliein. i^- Liitk. Vidensk. Meddel. 

 1861, p. 205 ; Strauch, Mel. Biol. Ac. St. Petersb. xi. p. 395. 



Prsemaxillary teeth 7 ; maxillaries 5 — 5 ; mandibulars 8 — 8. 

 Snout rounded, prominent. Tail cylindrical, as thick as the body, 

 llostral moderate, subtriangular ; nasals forming a suture ; a pair of 

 large prcefrontals, a pair of smaller frontals, having together a sub- 

 rhomboidal shape, and a pair of small occipitals ; the longest suture 

 is that between the frontals, tlicn come those of the pra^frontals, 

 nasals, and occipitals ; the length of the nasal suture equals only 

 half that of the i)ra;frontal ; eye visible through the ocular ; a post- 

 ocular, no iiifraocular, the ocular foi'ining a suture with the second 

 and third labials ; four upper labials, fourth small ; mental trapezoid, 

 followed bv a seven-sided chin-shield ; tlirce lower labials : second 



