112 COLTJBEID^. 



internasals much shorter than the prsefrontals ; frontal as long as- 

 broad or slightly longer than broad, as long as or a little longer 

 than its distance from the end of the snout, shorter than the 

 parietals ; loreal as long as deep or longer than deep ; one prse- 

 ooular, not reaching the upper surface of the head; two postoculars; 

 temporals 1+2, 2 + 2, or 2+3; seven upper labials, third and 

 fourth entering the eye ; four or five lower labials in contact with 

 the anterior chin-shields, which are as long as or a little longer than 

 the posterior. Scales in 17 rows. Ventrals 171-208; anal entire; 

 subcaudals 80-97, single. Eeddish or pale brown to blackish above,, 

 paler brown or yellowish on the sides ; upper surface of head and 

 nape blackish, with or without a yellowish band across the templea- 

 and occiput ; beneath yellowish white. 



Total length 870 millim. ; tail 200. A larger specimen, with- 

 injured taU, measures 1060 millim. to vent. 



Guianas, Brazil, 



a. <S (V. 171 ; 0. 84). Demerara. J. J. Quelch, Esq. [P,].. 



b. d (V. 177 ; 0. 96). Para. Dr. E. A. Goldi rp.]. 



c. 2 (V. 190; 0.80). Para. 



d. e. P (V. 208 ; 0. 83) Rio Janeiro. A. Fry, Esq. rp.l 

 &yg.(V. 199; '0.82). 



/. ? (V. 201 ; 0. ?). PetropoUs, Organ A. H. E. Petre, Esq. 



Mta. [P.]. 



g. 2 (V. 199; 0. 82). Brazil. Dr. Gardner [0.]. 



16. Oxyrhopus neuwiedii. 



Scytale coronata, Wied, Abbild. (1824) ; Cope, Proc. Ac. PMladr 



1860, p. 79 ; Jan, Icon. Gen. 34, pi. v. figs. 3 & 4 (1870). 

 Lycodon cloelia, part., Schleg. Phys. Serp. ii. p. 114 (1837). 



cleUa, Trosch. in 8chomb. Seise Brit. Guian. iii. p. 653 (1848), 



Scytale neuwiedii, part., Bum. S^ Bibr. vii. p. 1001 (1854). 

 — — coronatum, part., Gunth. Cat. p. 187 (1858). 

 Olisthenes euphseus, Ccpe, Proc. Ac. Philad. 1859, p. 296. 

 Pseudoboa neuwiedii, Cope, Proc. Ac. Philad. 1860, p. 260. 

 Olisthenes coronatus, Cope, Proc. Ac. Philad. 1868, p. 107. 



Eye rather small ; snout obtuse, moderately projecting. Eostral 

 broader than deep, forming an obtuse angle above, the portion visible 

 from above measuring about one half its distance from the frontal ; 

 internasals much shorter than the prsef rontals ; frontal a little 

 longer than broad, as long as or a little shorter than its distance 

 from the end of the snout, shorter than the parietals ; loreal much 

 longer than deep ; one prseocular, not reaching the upper surface of 

 the head ; two postoculars ; temporals 2+2 or 2 + 3 ; eight (excep- 

 tionally seven) upper labials, fourth and fifth (or third and fourth) 

 entering the eye ; four lower labials in contact with the anterior 

 chin-shields, which are as long as or a little shorter than the 

 posterior. Scales in 19 rows. Ventrals 177-205; anal entire; 

 subcaudals 64-96, single. Pale brown or whitish above, uniform 

 or with a few scattered blackish spots ; upper surface of head and 



