2. NARDOA. 75 
visible from above measuring one half to two thirds its distance 
from the frontal; internasals shorter than the prefrontals; frontal 
a little longer than broad, separating the parietals, and in contact 
with the occipital ; supraocular small; one pre- and two or three 
postoculars ; ten or eleven upper labials, fourth and fifth, or fifth 
and sixth entering the eye (or separated from it by a subocular). 
Scales in 31 to 33 rows. Ventrals 250-265; anal divided; sub- 
caudals 39-47. Reddish or purplish brown above, uniform or with 
ae scattered small yellowish spots, uniform yellowish white 
benea 
Total length 880 millim.; tail 90. 
Southern Mexico. 
a-b. 2 (V. 263, 252; Tehuantepec. FF. Sumichrast [C.]. 
C. 44, 39). 
e. Hgr. (V. 256; C. 47). ——? ai en Conyngham, Esq. 
P.1. 
} 
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4 
Skull of Nardoa boa, 
Tortrix, part., Schleg. Phys. Serp. ii. p. 1 (1837). 
Nardoa, part., Gray, Zool. Miscell, p. 45 (1842), and Cat. Sn. p. 93 
1849). 
Nanton, Dum. & Bibr. Erp. Gén, vi. p. 444 (1844); Jan, Icon. Gén. 
p- 99 (1864). 
