94. PROSYMNA. 247 
mandibular teeth few, very small, equal. Head not distinct from 
neck; snout much depressed, projecting, with angular horizontal 
edge ; eye rather small, with vertically subelliptic pupil ; nostril in 
a semidivided nasal, a horizontal suture extending from the nostril 
to. the loreal ; prefrontal usually single. Body cylindrical, short ; 
scales smooth or keeled, with apical pits, in 15 or 17 rows. Tail 
short, ending in a horny spine; subcaudals m two rows. 
Tropical and South Africa. 
Synopsis of the Species. 
I. Seales smooth. 
A. Two internasals; two superposed anterior temporals. 
1. sundevallit, p. 247. 
B. A single internasal; a single anterior temporal. 
1. Third and fourth or fourth and fifth upper labials entering 
the eye; two or three postoculars. 
Width of the frontal not half the width of 
the head: subcaudals 50 ............ 2. frontalis, p. 248, 
Width of the frontal more than half the 
width of the head; subcaudals 19-34... 3. ambigua, p. 248. 
2. Second and third upper labials entering the eye; one 
POSbOCWIAT. ©. 25 SSre 0-9 e are ieeveyets 4, meleagris, p. 249. 
ive bcates Keeleds ' uh dsic's ex ait s Ste 5. gant, p. 249. 
1. Prosymna sundevallii. 
Temnorhynchus sundevalli, Smith, Ill. Zool. S. Afr., Rept., App. p. 17 
(1849); Peters, Mon. Berl. Ac, 1867, p. 285. 
Rhinostoma cupreum, Giinth. Cat. p. 9 (1858). 
Temnorhynchus frontalis, part., Peters, l.c. p. 236, pl. —. fig. 2. 
Rostral very large and broad, with sharp horizontal edge, usually 
in contact with the prefrontal; a pair of internasals, separated from 
each other or in contact with their inner angles ; prefrontal single 
(rarely divided); frontal large, more than half the width of the 
head, considerably longer than the parietals ; loreal square or rather 
deeper than broad; one pra- and two or three postoculars ; tem- 
porals 2+2 or 2+3; usually seven upper labials, third and fourth 
entering the eye (rarely eight, fourth and fifth entering the eye) ; 
only one pair of well-developed chin-shields. Scales smooth, in 15 
rows. Ventrals 125-169; anal entire; subcaudals 23-38. Pale 
brown above, each scale edged with darker; head yellowish, with a 
more or less distinct dark brown band between the eyes and a. large 
dark brown crescentie bloteh bordering the parietals posteriorly ; two 
