40, GONIONOTOPHIs. 323 
40. GONIONOTOPHIS. 
Se (non Gray), Mocquard, Bull. Soe, Philom, (8) i. 1889, 
p- 
Maxillary teeth 26, anterior but slightly longer than the others ; 
anterior mandibular teeth likewise slightly longer. Head scarcely 
distinct from neck, much depressed ; eye small, with vertically elliptic 
pupil; nostril large ; preocular present or absent. Body cylindrical ; 
scales keeled, with apical pits, in 15 or 21 rows, those of the middle 
row enlarged and bicarinate ; ventrals rounded or obtusely angulate 
laterally. Tail moderate; subcaudals in two rows. Hypapo- 
ag ba developed throughout the vertebral column. 
pical Africa, 
Synopsis of the Species. 
Scales strongly keeled, in 21 rows ; temporals 
Ro seep aa dsrar ic 1. brussauxi, p. 323. 
0 SENSE Ee inionico 2. vossii, p. 323. 
MEETS 2 edb akc vaVb Cs dek a eeeinvc 3. grantii, p. 324. 
1. Gonionotophis brussauxi. 
Gonionotus brussauxi, Mocquard, l. c. p. 146, pl. ii. 
Rostral twice as broad as deep, scarcely visible from above ; in- 
ternasals very short; frontal as broad as long, as long as its distance 
from the end of the snout, much shorter than the parietals ; supra- 
ocular very small; loreal more than twice as long as deep; no 
preocular, the loreal and the prefrontal entering the eye; two 
postoculars; temporals 242; eight upper labials, fourth and fifth 
entering the eye; five lower labials in contact with the anterior 
chin-shields, which are longer than the posterior. Scales in 21 
rows, strongly keeled, the vertebral sharply bicarinate on the 
posterior half of the body. Ventrals 176; anal single ; subcaudals 
73. Blackish brown abeve, dirty yellow beneath, 
Total length 440 millim. ; tail 118. 
Loudinia-Niari, Congo. 
2. Gonionotophis vossii. 
Gonionotus vossi, Boettg. Zool, Anz. 1892, p 418, 
Closely allied to the preceding, but head shorter, prafrontals not 
longer than broad, and temporals 14+2,. Scales in 21 rows, the 
vertebral sharply bicarinate throughout the body. Ventrals 17 
anal single ; subcaudals 76. 
Total length 454 millim. ; tail 110. 
Cameroons, 
