442 AMPHISB.ENIDZ. 
largest, first two forming a suture with the median chin-shield; a 
pair of chin-shields on each side, in contact with the second and 
third labials. Two hundred and thirteen to two hundred and forty- 
seven annuli on the body (Strauch), and sixteen or seventeen on the 
tail (28-37, Strauch); the segments of the annuli longer than 
broad on the back and sides, a little broader than long on the two 
median ventral rows; on the middle of the body, each annulus 
contains thirty segments, fourteen on the dorsal, and sixteen on the 
ventral side. Lateral line distinct. Six anal segments. Praanal 
pores two or four, frequently (9?) very indistinct. Light brown 
above, yellowish inferiorly. 
millim. 
Length to vent .............. 270 
Lal: ¢ acasimeye mew GMa ay tae 21 
Diameter of body ............ 8 
Northern and Central Brazil. 
a, Ad. (A. 221417: p. 2). Brazil. Dr. Gardner [P.]. 
6. Ad. (A. 216+16; p. 4). Porto Bello (?). Capt. Austin [P.]. 
The determination of the latter specimen remains uncertain, the 
skin of the head having been entirely removed for investigation of 
the skull. However, the scaling of the body agrees well with that 
of A. vermicularis, and I am inclined to regard the identification as 
correct. It isnot by any means identical with the species described 
below as A. cea, as suggested by Strauch (/. c. p. 406), the body 
being much more elongate, and the scales less numerous below the 
lateral lines (sixteen instead of twenty-four). 
9. Amphisbena darwinii. 
Amphisbena darwinii, Gray, Cat. Tort. p. 71, 
and Sh, Rept. ii. p. 36. 
— camura, Gray, 1. c. p. 35. 
heterozonata, Gray, l. ¢. 
Amphisbeena darwinii, Dum. § Bibr. v. p.490; Peters, Mon. Berl. Ac. 
1878, p. 781, pl. —. fig. 6; Strauch, Mél, Biol. Ac. St. Petersb. 
xi. p. 403; Bouleng. dnn. § Mag. N. H. (5), xvi. 1885, p. 296. 
camura, Cope, Proc. Ac. Philad, 1862, p. 350. 
vermicularis (non Wagl.), Hensel, Arch. f. Nat. 1868, p, 839. 
heterozonata, Burmeist, Reise La Plata, ii. p. 527. 
F trachura, Cope, Proc. dm. Philos, Soc. xxii. 1885, p. 187, pl.—. 
g. 5. 
Aporarchus prunicolor, Cope, J. ¢. p. 189, pl. —. fig. 5. 
This more southern form is so closely allied to the preceding that 
but a few slight differences distinguish them :—The suture between 
the prefrontals is slightly longer than that between the frontals ; 
the fourth upper labial is generally missing ; the annuli on the body 
are less numerous, one hundred and eighty-two to two hundred 
(177 to 214, Strauch), Caudal annuli, nineteen to twenty-five (17 
to 25, Strauch). The number of segments in one annulus of the 
middle of the body varies between twenty-eight and thirty-eight, 
