438 



AMPHISB^NID^. 



annulus contains forty to fifty-two segments, twenty to twenty-six 

 on the dorsal, and as many on the ventral side. Lateral line dis- 

 tinct. Eight or ten anal shields. Praeanal pores seven to ten 

 (6 to 12, Straucli), eight being the usual number. Black and white 

 varied, either the one or the other colour predominating. 



millim. 



Length to vent 390 



Tail 55 



Diameter of body 18 



Tropical South America ; West Indies. 



a. Ad. (A. 193+27; p. 8). W. Indies. Miss Saul [P.]. 



b-d. Ad. & hgr. (A. 198+9, 201 British Guiana. 

 +8,204+30; p. 8, 8, 10). 



e. Ad. (A. 199+9 ; p. 8). Berbice. Lady Essex [P.]. 



f. Ad. (199+29; p. 8). Berbice. 



'ff. Hgr. (A. 203+28 ; p. 7). Demerara. Capt. Sabine [P.J. 



h-i. Ad. & hgr. (A. 201+29, 217 Upper Amazon. 



+28; p. 8, 9). 



k. Ad. (A. 204+80 ; p. 8). Moyobamba. Mr. A. H. Roff [C.]. 



/. Ad. (A. 209+9 ; p. 8). Cashiboya, Messrs. Veitch [P.]. 



N.E. Peru. 



m-n. Ad. & hgr. (A. 207 + 30, Saravacu. Messrs. Veitch [P.]. 



212+31 ; p. 8, 9). N.E. Peru. 



o. Ad. (A. 211+32 ; p. 9). Guayaciuil. Mr. Eraser [C]. 



J}. Ad. (A. 207+27 ; p. 8). S. America. 



q. Ad. (204+11 ; p. 8). S. America. Bristol Museum [P.J. 



r. Ad. (^202+29 ; p. 8). S. America. 



s. Ad. (A. 210+27 ; p. 7). S. America. 



t. Ad., stuffed. S. America. 



M. Hgr., skeleton, S. America. 



2. AmphisbaBna alba. 



Amphisbsena alba, Grai/, Cat. To)-t. p. 70, 

 and Sh. Rept. p. 35. 

 Ampbisbaena alba, Linn. S. N. i. p. 393 ; Daud. Rept. vii. p. 401 , 

 pi. xci. tig. 1 ; Dum. %■ Bihr. v. p. 484 ; Strauch, Mel. Biol. Ac. 

 St. Petersb. xi. p. 378. 



rosea, Shaw, Nat. Miscell. iii. pi. 86. 



pacbyura, Wolf, Ahhild. u. Beschr. merkw. nat, Gegenst. ii. p. 61, 



pi. xvii. 



flavescens, Wied, Abbild. Nat. Bras. ; Wagl. Icon. Descr. Amph. 



pi. xvi. fig. 1. 



Prsemasillary teeth 5 ; maxillaries 5 — 5 ; mandibulars 8 — 8. 

 Snout broad, rounded, slightly prominent. Tail as thick as the body, 

 of equal width throughout. Rostral moderate, subtriangular ; nasals 

 and prjefrontals very large ; frontals smaller ; postocular large, 

 sometimes divided ; no infraocular, the ocular, through which the 

 eye is distinguishable, forming a suture with the second and third 

 labials ; four upper labials, fourth small ; mental trapezoid, followed 

 by a heptagonal or pentagonal chin-shield ; three or four lower 



