40 
Annals of the Transvaal Museum. 
29. Lower eyelid scaly (limbs sometimes rudimentary) ; tongue witli 
oblique plicae above ... ... ... Tetradactylus. (Gr.) 
Lower eyelid with a large transparent disk; tongue with imbricate 
scale-like papillae above ... ... ... Cordylosaurus. (Gr.) 
30. Nostril in a single nasal ... ... ... ... ... ... 31 
Nostril between two to four nasals ... ... ... ... 36 
31. Dorsal scales granular, head and body strongly depressed, limbs 
well developed ... ... ... ... Flatysaurus. (Z.) 
Dorsal scales not granular, but comparatively large and 
imbricate ... ... ... ... ... ... ... ... 32 
32. Dorsal scales lanceolate and strongly keeled; body serpent if orm 
Chamaesaura. (Z.) 
Dorsal scales not lanceolate but rhomboidal or cycloid- 
hexagonal ... ... ... ... ... ... ... 33 
33. Tail spinose ... ... ... ... ... Zonurus. (Z.) 
Tail not spinose ... ... ... ... ... ... ... 34 
34. Eyelids well developed, movable... ... ... ... ... 35 
Eyelid immovable, transparent, covering the eye 
Ablepharus. (S.) 
35. Lower eyelid scaly ... ... ... ... . . .Lygosoma. (S.) 
Lower eyelid with an undivided, more or less transparent disk 
Mabuia. (S.) 
36. Collar distinct ... ... ... ... ... ... ... 38 
.N o collar ... ... ... ... ... ... ... ... 37 
37. Digits distinctly keeled interiorly, headscales strongly keeled and 
striated ... ... ... ... ... Ichnotropis. (L.) 
Digits smooth or indistinctly keeled interiorly ; headscales smooth 
or merely finely ribbed .. . ... ... Tropidosaura. (L.)-- 
38. Digits not fringed laterally ... ... ... ... ... 39 
Digits fringed laterally sometimes, only feebly so Scapteira. (L.) 
39. Digits smooth or indistinctly keeled interiorly ... Nuchas. (L.) 
Digits distinctly keeled interiorly ... ... ... Eremias. (L.) 
A. 
signifies Agamidae. 
V. 
signifies Varanidae. 
Gr. 
„ Geckonidae. 
Z. 
Zonuridae. 
Gr, 
,, Gerrhosanridae. 
c. 
,, Chamaeleontidae. 
L. 
„ Lacertidae. 
. An. 
,, Anelytropidae. 
S. 
„ Scincidae. 
Am. Amphisbaenidae.- 
