42 
Annals of the Transvaal Museum. 
13. 
14. 
15. 
16. 
17. 
18. 
19 . 
20 . 
21 . 
22 . 
23. 
24. 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
Rostral at least 3 times as broad as the nasal. 
Glauconia scutifrons (Peters). 
Rostral less than twice as broad as the nasal 
Rostral extending to the level of the anterior border of the eyes, 
as broad as, or little broader than the nasal. 
Glauconia nigricans ( Schlegel ). 
Rostral extending to the posterior border of the eyes, broader 
than the nasal. 
Glauconia conjuncta (Jan). 
Labials without pits 
The two anterioi labials t u PP e1 ') deeply pitted, 4 or 5 of the 
posterior lower labials feebly pitted. 
Python sebse (Gmelin). 
Head covered with symmetrical shields ... 
Head covered with scales similar to those on the body 
Ventrals differentiated and enlarged 
Ventrals not differentiated from the other, scales. 
Hydrus platurus L. 
Ventrals with a lateral keel 
Ventrals rounded 
Middle row of scales enlarged and bicarinate. 
Simocephalus ... ... ... 
Middle row of scales not enlarged and bicarinate 
Two postoculars. Simocephalus capensis (Smith). 
One postocular. Simocephalus nyassse (Guenther). 
Subcaudals rounded 
Subcaudals keeled. Pliilothamnus semivariegatus (Sm ah). 
Scales smooth in 15 or 17 rows 
Scales keeled, in 19 or 21 rows 
Pupil vertical, scales in 17 rows. 
Pupil round, scales in 15 rows. 
Ohlorophis 
Three labials enter the eye. 
Two labials enter the eye... 
Lycodon aulicus (L) 
Ohlorophis irregularis (Leach) 
Ventrals not keeled. Ohlorophis hoplogaster (Guenther) 
Ventrals keeled. Ohlorophis natalensis (Smith) 
Subcaudals in two rows ... 
Subcaudals single 
Loreal present ... 
No loreal 
Snout with an angular horizontal edge. 
Prosymna 
Snout has no angular horizontal edge .... 
Two internasals. Prosymna sundevalli (Smith) 
One internasal. Prosymna frontalis (Peters) 
Anal entire 
Anal divided 
Pupil round ... 
Pupil vertical ... 
Scales in 23 or more rows 
Scales' in less than 23 rows 
Scales with apical pits 
Scales without apical pits 
14 
16 
17 
89 
18 
19 
26 
20 
21 
22 
23 
52 
24 
27 
67 
28 
70 
29 
30 
31 
48 
43 
32 
33 
40 
34 
37 
