142, pyrHonopiPsas. 45 
1. Lycodryas sancti-johannis. (Prare III. fig. 2.) 
Pp 
Head much depressed, with broad, truncated snout. Rostral 
twice as broad as deep, scarcely visible from above; internasals as 
long as broad, much shorter than the prefrontals; frontal with 
concave sides, a little longer than broad, as long as its distance 
from the end of the snout, much shorter than the parietals; nostril 
between two nasals ; loreal twice as long as deep; one preocular, 
forming a suture with the frontal; three postoculars; temporals 
small, scale-like, 2+2 or 2+3; eight or nine upper labials, fourth 
and fifth or third, fourth, and fifth entering the eye; four or five 
lower labials in contact with the anterior chin-shields, which are 
larger than the posterior. Scales in 19 rows. Ventrals 243-258 ; 
anal divided ; subcaudals 75, the 23 or 24 anterior single. Reddish 
yellow above, uniform or mottled with brown; some rather ill- 
defined dark cross-bars may be present on the neck; lower parts 
yellowish, uniform or dotted with blackish. 
Total length 770 millim.; tail 150. 
Comoro Islands. 
a. 3 (V. 258; C.?). Johanna. C. = Bewsher, Esq. [C.]. 
(Type.) 
b. do (V. 248 ; C. 75). Comoro Ids. Sir J. Kirk [C.]. 
142. PYTHONODIPSAS. 
Pythonodipsas, Giinth. Ann. § Mag. N. H. (4) i. 1868, p. 425, 
Maxillary teeth 13, third to sixth longest, followed, after a very 
short interspace, by a large, grooved fang; second to fifth mandi- 
bular teeth strongly enlarged, fang-like. Head distinct from neck ; 
eye moderate, with vertically elliptic pupil; nostrils directed 
upwards, pierced between a nasal and a supranasal; parietals 
broken up into small shields. Body cylindrical; scales smooth or 
very obtusely keeled, with apical pits, in 21 rows ; ventrals rounded. 
Tail moderate ; subcaudals single. Hypapophyses developed 
throughout the vertebral column. 
Tropical Africa, 
1. Pythonodipsas carinata. 
Pythonodipsas carinata, Giiinth. Ann. § Mag. N. H. (4) i. 1868, p. 426, 
pl. xix. fig. K; Bowleng. Ann. § Mag. N. H. (6) ii. 1888, p. 140. 
Snout broad, truncate, concave above ; rostral more than twice as 
broad as deep, scarcely visible from above; internasals considerably 
longer than broad, shorter than the preefrontals ; frontal as broad as 
the supraocular, nearly twice as long as broad, with concave sides; 
one or two small shields between the prefrontals and the frontal ; 
several small loreals; one preeocular, three or four suboculars, and 
three postoculars ; temporals small, scale-like; nine upper labials; 
four or five lower labials in contact with the anterior chin-shields, 
Lycodryas sancti-johannis, Giiinth. Ann. § Mag. N. H. (5) iii. 1879, . 
218. 
