154. oxrsHoPTJs. Ill 



little longer than the posterior. Scales in 19 rows. Ventrals 204^ 

 215 ; anal entire ; subcaudals 67-85 pairs. Greyish or brown above, 

 uniform or scales edged with blackish ; upper surface of head and 

 nape blackish brown, with or without a yellow band across the 

 ifcemples and occiput ; lower parts yellowish white, subcaudals edged 

 with brown. 



Total length 820 millim. ; tail 145. 



Paraguay. 



«. $ (V. 216 ; C. 67). Asuncion. Dr. J. Bohls [C.]. 



14. Oxyrhopus rusticus. 



Brachyruton plumbeum, part., Dwm. Sr Bibr. vii. p. 1004 (1854). 



cloelia, part., Jan, Icon. Gin. 84, pi. vi. fig. 3 (1870). 



Oxyrhopus rusticus. Cope, Proc. Amer. Philos. Soc. xyii. 1877, p. 92. 



Snout more conical and eye smaller than in 0. cloelia. Eostral a 

 little broader than deep, the portion visible from above measuring 

 about half its distance from the frontal ; internasals much shorter 

 than the prsefrontals ; frontal a little longer than broad, as long as 

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

 parietals ; loreal longer than deep ; one prseocular, small ; two 

 postoculars; temporals 2+2 or 2 + 3; seven (exceptionally eight) 

 upper labials, third and fourth (or fourth and fifth) 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 19 rows. Ventrals 197-223 ; anal entire ; subcaudals 44- 

 61 pairs. Yellowish brown or pale brown above, some or aU of the 

 scales edged with blackish brown ; uniform yellowish beneath. 



Total length 1140 millim. ; tail 140. 



Southern Braail, Uruguay, Argentina. 



«-6. Hgr. ? (V. 223 ; S. Lorenzo, Rio Dr. H. v. Ihering [C.]. 



C. 44) & yg. (V. 201 ; , Grande do Sul. 



C. 61). 



c. tS (V. 197 ; C. 60). Buenos Ayres. E. W. White, Esq. [0.]. 



&-e. S (V. 211 ; C. 54) Argentina. 



&? (V.210;C.45). 



15. Oxyrhopus coronatus. 



Pseudoboa coronata, Schneid. Sist. Anvph. ii. p. 286 (1801). 



Boa coronata, Baud. Mept. v. p. 220 (1803). 



Seytale coronata, Merr. Tent. p. 91 (1820) ; Dwm. 8f Bibr. vii. p. 999 



(1854). 

 Lycodon cloelia, part,, Schleg. Phys. Serp. ii. p. 114, pi. iv. figs. 12 & 



13 (1837). 

 Seytale coronatum, part., Oiinth. Cat. p. 187 (1858). 



Eye rather small, about one third the length of the snout in the 

 adult ; snout broad, rounded, scarcely projecting. Eostral broader 

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

 above measuring about one third its distance from the frontal; 



