148 . COLUBRID. 
Total length 430 millim. ; tail 70. 
Southern Brazil. 
for ys aN, 170; Lagos, Sta. Catharina. Hr. Michaélis [C.}. 
C. 57). 
4. Xenodon neuwiedii. 
Xenodon rhabdocephalus, part., Dum. § Bibr. vii. p. 758 (1854); 
Giinth. Cat. p. 56 (1858); Jan, Arch. Zool. Anat. Phys. ii. 1863, 
p. 317, and Icon. Gén. 19, pl. v. fig. 1 (1866). 
neuwiedii, Giinth. Ann. § Mag. N. H. (38) xii. 1863, p. 354, 
pl. v. fig.C; Hensel, Arch. f. Nat. 1868, p. 228. 
severus, part., Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 317. 
neovidil, Cope, Proc. Ac. Philad. 1868, p. 138. 
Maxillary teeth 13-15+42, Head moderately depressed. Rostral 
shield once and a half to once and two thirds as broad as deep, the 
portion visible from above measuring about one fourth to one third 
its distance from the frontal ; internasals broader than long (if but 
very slightly), shorter than the prefrontals ; frontal longer than 
~ broad, as long as its distance from the end of the snout, as long as 
or a little shorter than the parietals; loreal as long as deep or 
deeper than long ; one pre- and two postoculars ; temporals 1+2 ; 
eight upper labials, fourth and fifth entering the eye; five lower 
labials in contact with the anterior chin-shields, which are larger 
than the posterior. Scales in 2l rows. Ventrals obtusely angulate 
laterally, 152-176 ; anal divided (exceptionally entire); subcaudals 
50-69. Above with more or less distinct, dark brown, black-edged, 
angular cross bars separated by narrow yellowish or pale olive 
interspaces ; usually a large A or A-shaped dark marking on the 
nape; a f)-shaped dark band round the head, passing through the 
eyes, and a dark cross bar between the eyes; belly yellowish, 
usually with brown dots which crowd together to form cross bands ; 
usually a few deep black spots on each side of the anterior part of 
the body. 
Total length 800 millim.; tail 130. 
Southern Brazil. 
a,b, c-e. g (V. 170, 162; Rio Janeiro. A. Fry, Esq. ) 
©; (66, -62), 9 (V. 162; (Pe. 
C. 56), & yg. (V. 156, 152; 
C. 60, 50). ;(Types.) 
fri. 3 (V. 174; C.65) & yg. Rio Janeiro. 
(V. 154, 1683, 166; C. 51, 
53, 58). i] 
k-qg. & (V. 159, 163; C. 68, Rio Janeiro. Mrs. Fry [P.]. 
59) & Q (V. 162, 164, 
165, 164, 159; C. 50, 51, 
53, 50, 50). 
rod (V2d76; C..68). 8S. José dos Mr. A. Thomson [P.]. 
Campos, Proy. 
8. Paulo. 
s. Yg. (V. 166; C. 64). Santos, Brazil. Christiania Museum. 
t. Skeleton. Rio Janeiro. A. Fry, Esq. [P.]. 
