3. AMPHISBENA, 437 
b. Suture between the nasals not one third as long as that 
between the prefrontals, 
Ocular forming a suture with the second 
labial; a preocular .............. 15. mildei, p. 445. 
Ocular forming a suture with the second 
and third labials; no preocular .... 16. ceca, p. 445. 
Ocular united with the second labial .. 17. cubana, p. 446. 
2. Four prefrontals, 
The two pairs of prefrontals in front of 
Gach OGG ais: fee's savaged @wde de -eceoale 10. albocingulata, p. 443. 
The two pairs on a transverse line .... 19. quadrifrons, p. 447. 
3. Preefrontals, nasal and anterior 
labial on each side united into 
asingle shield ............ 23. leonina, p. 448. 
IL. Nasals small, separated from each other. 
A pair of prefrontals; rostral narrow 
superiorly ; snout pointed.......... 25. fenestrata, p. 449. 
A single prefrontal ................ 26. punctata, p. 450. 
A pair of prefrontals; rostral large ; 
snout compressed ...............5 27. brasiliana, p. 450. 
1. Amphisbena fuliginosa. 
Amphisbena americana, Gray, Cat. Tort. p. 70, 
and Sh. Rept. ii. p. 35. 
Amphisbena fuliginosa, Linn. S. N. i. p. 892; Daud. Rept. vii. 
p. 406, pl. xci. fig. 2; Guér, Icon. R. A., Rept. pl. xviii. tig. 1; 
Dum. §& Bibr. v. p. 480; Strauch, Mél. Biol. Ac. St. Petersh. xi. 
1881, p. 376; Bocourt, Muss. Sc, Mex., Rept. p. 489, pl. xxi. f. 5. 
vulgaris, Laur. Syn. Rept. p. 66. 
varia, Laur. 1. c. 
—— magnifica, Laur. 1. ec. 
—— flava, Laur. 1. c. p. 67. 
Usually : premaxillary teeth 5; maxillaries 5—5; mandibulars 
8—8. Snout broad, rounded, slightly prominent. Tail not so thick 
as the body, constricted at the base. Rostral moderate, subtri- 
angular ; nasals very large, the largest shields of the head forming 
a suture ; a pair of large preefrontals and a pair of smaller frontals, 
followed by two or three pairs of square shields; eye distinct 
through the ocular ; one or two infraoculars, the anterior, if present, 
formed by division of the second labial; upper labials three or four, 
posterior small; mental quadrangular, followed by a median sub- 
pentagonal chin-shield ; on each side a pair of large chin-shields ; 
three or four lower labials, first large, the others small. One 
hundred and ninety-three to two hundred and seventeen annuli on 
the body, and twenty-four to thirty-two on the tail; the seements 
of these annuli longer than broad on the back and sides, equilateral 
or broader than long on the belly ; on the middle of the body, each 
