442 AMPHISBiENID-S;. 



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 (Stranch), and sixteen or seventeen on the 

 tail (28-37, Stranch) ; 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 annulua 

 contains thirty segments, fourteen on the dorsal, and sixteen on the 

 ventral side. Lateral liue distinct. Six anal segments. Prseanal 

 pores two or four, frequently ( $ ?) very indistinct. Light brown 

 above, yellowish interiorly. 



millim. 



Length to vent 270 



Tail 21 



Diameter of body 8 



Northern and Central Brazil. 



n. Ad. (A. 221+17 : p. 2). Brazil. Dr. Gardner [P.]. 



b. Ad. (A. 216+lG; p. 4). Porto BeUo (?). 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. vermicidaris, and I am inclined to regard the identification as 

 correct. It is not by any means identical with the species described 

 below as A. co'ca, 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. AmpMsbaena darwinii. 



Amphisbsena darwinii, Gray, Cat. Tort. p. 71, 

 and Sh. Rept. ii. p. 36. 



camura, dray, I. c. p. 35. 



heterozonata, Gray, I. c. 



Amphisbsena darwiuii, Dxm. S,- Bihr. v. p. 490 ; Peters, Mon. Berl. Ac. 

 1878, p. 781, pi. — . ^S-Q; Strauch, 3Iel. Biol Ac. St. Petersb. 

 xi. p. 403 ; Bouleng. Ann. Sf Mag. N. H. (5), xvi. 1885, p. 296. 



camura, Cope, Proc. Ac. Philad. 1862, p. 350. 



vermicularis (non War/l.), Hensel, Arch. f. Nat. 1868, p. 839. 



heterozonata, Barmeist. Reise La Plata, ii. p. 527. 



trachura, Cope, Proc. Am. Philos. Soc. xxii. 1885, p. 187, pi. — . 



fig. 5. 

 Aporarchus prunicolor, Cojje, I. c. p. 189, pi. — . 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 prsefrontals 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, 



