452 AMPHISB>ENID^. 



large, eye more or less distinct ; nostril pierced in the anterior por- 

 tion of a small nasal situated in a notch of the rostral ; an elongate 

 praeocular, about the size of the nasal ; three upper labials ; mental 

 quadrangular, followed by a subpentagonal chin-shield of nearly 

 equal size ; a larger lateral chin-shield ; three lower labials, third 

 small. Two hundred and seventeen or two hundred and twenty- 

 four annuli on the body, and twenty or twenty-one on the tail 

 (214 to 240 -f 20 to 24, Stranch); on the middle of the body an 

 annulus comprises thirty-two or thirty-eight segments, sixteen or 

 eighteen above, and sixteen to twenty below the lateral lines ; the 

 dorsal segments longer than broad, the ventrals rectangular or 

 a little broader than long. Lateral line distinct. Six anal seg- 

 ments. Four prseanal pores. Purplish brown above, whitish in- 

 feriorly. 



millim. 



Length to vent 210 



Tail 22 



Diameter of body 7 



Southern Brazil, Uruguay, Argentine Eepublic. 



a. HgT. (A. 224-1-21). Rio Grande do SnI. Dr. v. Iheriug [C.]. 

 b-f. Ova & foeti. Rio Grande do Sul. Dr. v. Ihering [C.l. 



ff. Yg. (A, 2174-22). Cosquin, Cordova. E. W. White, Esq. [C.]. 



2. Anops africanus. (Plate XXIII, fig. 4.) 



Baikia africana, Gray, Cat. Sh. Rept. ii. p. 39. 

 Baikia africana, Gray, Proc. Zool. Soc. 1865, p. 451, fig. 

 Amphisbsena africana, Struuch, Mel. Biol. Ac. St. Fetersb. xi. p. 421. 



Head separated from the body by a circular fold. Nasal confluent 

 with rostral anteriorly (this may be an individual anomaly) ; two 

 shields behind the rostral on each side, forming a short suture, the 

 anterior, or praefrontal, narrow, band-like, descending to the second 

 labial and the ocular ; ocular extremely small, triangular at the 

 point of intersection of the praefrontal, the frontal, the temporal, and 

 the second and third labials ; eye distinguishable, not under the 

 ocular, but in the supero-anterior corner of the third labial ; upper 

 labials three, first very small, second largest ; mental quadrangular, 

 followed by an elongate quadrangular chin-shield ; two lower labials, 

 first very large, second very small ; a large chin- shield on each side, 

 behind the first labial. One hundi'ed and forty-eight annuli on the 

 body and twenty-five on the tail ; an annulus contains thirty-eight 

 segments, twenty dorsal and eighteen ventral ; latter, two median a 

 little broader than long; dorsal segments longer than broad. Lateral 

 line distinct. Ten anal segments ; four praeanal pores. Plesh- 

 coloured. 



millim. 



Length to vent 180 



Tail 22 



Diameter of body 5 



a. 



W. Africa. (Type.) 



