Y, ATRACTASPIS, ‘611 
Fig. 36. 
Skull of Atractaspis aterrima. 
Synopsis of the Species. 
I. Anal divided ; subcaudals all or greater part divided. 
A. Six upper labials, fifth very large and forming a suture with 
the parietals; no preocular; frontal shorter than the 
parietals ; scales in 17 rows; ventrals 167-174. 
1. hildebrandtii, p. 512. 
B. Five upper labials, fourth largest ; postocular in contact with 
a large temporal; a preocular; frontal as long as, or slightly 
shorter than the parietals. 
Scales in 19-21 rows; ventrals 200-230. 2. congica, p. 513. 
Scales in 25-27 rows; ventrals 220-257. 3. irregularis, p. 513, 
JI. Anal entire ; subcaudals all or part entire. 
A. Postocular in contact with a large temporal. 
1. Second lower labial very large, fused with the chin-shields ; 
scales in 23-27 rows; ventrals 178-193; subcaudals 23— 
PROSE RG fap torrent SAE 4. corpulenta, p. 514. 
