3. AMPILISBAENA. 441 
segments. Eight preanal pores. White, the upper scales reddish 
brown. 
Length to vent 280 millim.; tail 34 millim. 
Brazil. 
6. Amphisbena leucocephala, 
Amphisbzena leucocephala, Peters, Mon. Berl. Ac. 1878, p. 778, pl. —. 
fig. 1; Strauch, Mél. Biol. Ac. St. Petersb. xi, p. 884. 
A pair of occipitals, nearly as large as the frontals; a small 
fourth upper labial; ten or twelve preanal pores. Otherwise I 
cannot see any difference, from the descriptions, between this and 
the preceding species. Two hundred and thirty-two or two hundred 
ag oe annuli on the body, twenty-nine or thirty on the tail. 
ahia. 
7. Amphisbena mertensii. 
Amphisbena mertensii, Strauch, Mél. Biol. Ac, St. Petersb, 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 
infraocular ; three upper and as many lower labials. Two hundred 
and twenty-nine annuli 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 annulus contains forty-four segments, twenty-four 
above and twenty below the lateral lines. Latter distinct. Eight 
anal segments. Seven preanal pores. Yellowish brown, lighter 
inferiorly. 
Length to vent 290 millim. ; tail 40 millim. 
8. America. 
8. Amphisbena vermicularis. 
Amphisbena vermicularis, Gray, Cat, Tort. p. 71, 
and Sh. Rept. ii. p. 85. 
Amphisbena vermicularis, Wagl. in Spix, Serp. Bras. p. 73, pl. xxv. 
fig.2; Dum. & Bibr. v. p. 489; Rhein. § Liith. Vidensk, Meddel, 
1861, p. 205; Strauch, Mél. Biol. Ac. St. Petersb. xi. p. 395. 
Premaxillary teeth 7; maxillaries 5—5; mandibulars 8—8, 
Snout rounded, prominent. Tail cylindrical, as thick as the body. 
Rostral moderate, subtriangular ; nasals forming a suture ; a pair of 
large prefrontals, 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, then come those of the prefrontals, 
nasals, and occipitals ; the length of the nasal suture equals only 
half that of the prefrontal ; eye visible through the ocular ; a post- 
ocular, no infraocular, the ocular forming a suture with the second 
and third labials ; four upper labials, fourth small ; mental trapezoid, 
followed by a seven-sided chin-shield; three lower labials ; second 
