450 AMBLYCEPHALID 2%. 
o. 2 (V. 179; C. 95). Pozuzu, Peru. Mr. W. Davis [C.]; 
% Messrs. Veite 
Her. (V. 179; C. 91) P del Sacra ww Davis [C 
; . (V. ; C.91). am e - . Ww. 13 
nate : acs Peru. ie Veit: 
q. Her. (V. 178; C. 92). Madre de Dios, an 
Bolivia. 
r-s. d w . 189; C. 108) & Canelos, Ecuador. Mr. Buckley [C.]. 
her. (V. 171; ©. 90). 
t. Sd (V.176; C. 97). Guayaquil. Mr. Fraser [C.]. 
u. Skull of o. 
2. Leptognathus pavonina. 
Dipsas pavonina, Schleg. Phys, Serp. ii. p. 280 (1837). 
Leptognathus bt sabes m. & Bibr. vii. p. 474 (1854) ; Giinth, 
Cat. p. 179 (1858) ; Cope, Proc, Ac. Philad. 1868, p. 107. 
—— catesbyi, part., Gtinth, 1. ce. p. 180. 
—— copii, Giinth. Ann. §& Mag. N. H. (4) ix. 1872, p. 30. 
Body slender, strongly compressed. Eyelarge. Rostral broader 
than deep, not or but scarcely visible from above; internasals one 
half to two thirds as long as the prefrontals; frontal as long as 
broad, nearly as long as its distance from the end of the snout, 
much shorter than the parietals; nasal entire or semidivided ; 
loreal deeper than long, bordering the eye, sometimes fused with 
the nasal or with a preocular; a preocular above the loreal; two 
or three postoculars; temporals 14+2 or 2 or 3; ten or eleven 
upper labials, fifth and sixth, fourth to sixth, or fifth to seventh 
entering the eye; first lower labial in contact with its fellow behind 
the symphysial; three pairs of chin-shields, anterior longer than 
broad. Scales in 13 rows, vertebrals more or less enlarged, largest 
not twice as broad as long. Ventrals 186-220; anal entire; sub- 
eaudals 112-145, Yellowish brown or cream-colour above, with 
very large elongate, dark brown, white-edged spots, disposed, singly 
or in pairs, at regular distances, the interspaces much shorter than 
the spots; these descend to the sides of the belly, the anterior even 
coalescing beneath and forming complete rings; head dark brown, 
spotted with white, or snout and temples white, 
Total length 700 millim. ; tail 230. 
Guianas, Brazil, Ecuador, Bolivia. 
a. 2 (V. 190; C. 112). Berbice. Lady Essex [P.]. 
b-e. g (V. 210, 217; C. 129, Demerara. 
125). 
d. g (V. 218; C. 140). Surinam, Lidth de Jeude Ool- 
lection. (Type of 
L. ome) 
e. Hgr. (V. 203; ©. 114), Para. Dr. E, A. Géldi [P.]. 
F. 2 (V. 186; C. 118). W. Ecuador. Mr. Fraser [C.]. 
g. & (V. 210; CO. 131). Madre de Dios, ‘ 
Bolivia. 
