154. oxyRHoPUs. 111 
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 
temples and occiput; lower parts yellowish white, subcaudals edged 
with brown. 
Total length 820 millim. ; tail 145. 
Paraguay. 
a. 2 (V. 215; C. 67). Asuncion. Dr. J. Bohls [C.]. 
14, Oxyrhopus rusticus. 
Brachyruton plumbeum, part., Dum. § Bibr. vii. p. 1004 (1854). 
— clelia, part., Jan, Icon. Gén. 34, pl. vi. fig. 3 (1870). 
Oxyrhopus rusticus, Cope, Proc. Amer. Philos. Soc. xvii. 1877, p. 92. 
Snout more conical and eye smaller than in O.clelia. Rostral a 
little broader than deep, the portion visible from above measuring 
about half its distance from the frontal; internasals much shorter 
than the prefrontals ; 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 preocular, 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 all of the 
‘scales edged with blackish brown ; uniform yellowish beneath. 
Total length 1140 millim.; tail 140. 
Southern Brazil, Uruguay, Argentina. 
a-b. Hgr. 2 (V. 223; 8. Lorenzo, Rio Dr. H. v. Ihering [C.]. 
C. 44) & yg. (V. 201; Grande do Sul. 
C. 61). 
e. & (V. 197; C. 60). Buenos Ayres. E. W. White, Esq. [C.]. 
d-e. 3 (V.211; C. 54) Argentina. 
3 
& Q (V.210; C, 45). 
15. Oxyrhopus coronatus. 
Pseudoboa coronata, Schneid. Hist. Amph. ii. p. 286 (1801). 
Boa coronata, Daud. Rept. v. p. 220 (1803). 
Scytale coronaia, Merr. Tent. p. 91 (1820) ; Dum. & Bibr. vii. p. 999 
(1854). 
Lycodon cleelia, part., Schleg. Phys. Serp. ii. p. 114, pl. iv. figs. 12 & 
13 (1837). ’ ’ Pp. i. p »P 88 
Scytale coronatum, part., Giinth. Cat. p. 187 (1858). 
Eye rather small, about one third the length of the snout in the 
adult ; snout broad, rounded, scarcely projecting. Rostral broader 
than deep, forming an obtuse angle above, the portion visible from 
above measuring about one third its distance from the frontal; 
