1. GERRHOSAURUS. 123 
in 20 to 24 longitudinal and 55 to 64 transverse series ; ventrals 
in 8 longitudinal series. Femoral pores 10 to 13. Tail about 
twice as long as head and body. Brown or olive above, usually 
with a light, black-edged streak on each side, extending from the 
supraoculars to the tail; a pair of narrow light streaks, sometimes 
broken up, may run along the middle of the back ; back frequently 
With squarish black spots with light central shafts; young with 
vertical black bars on the flanks; lower surfaces yellowish. 
millim. millim, 
Total length ...... 365 Fore limb ........ 27 
ead ossoaanicaada 20 Hind limb........ 47 
Width of head.... 15 als csaeiee maw 230 
Body ieee sacssie Sag 115 
South and East Africa (as far north as Sennar). 
a-f. Ad., her, & yg. 8. Africa. Sir A. Smith [P.]. 
g-h. Yg. 8. Africa. 
k,l. Ad. Port Natal. T. Ayres, Esq. [C.]. 
m-o. Ad. - Caledon River. Sir A. Smith [P.]. (Types 
of G. bibronit.) 
p-g, 7. Ad. —? 
s. Ad., skeleton. 8. Africa. Sir A. Smith [P.]. 
5. Gerrhosaurus typicus. 
Gerrhosaurus typicus, Gray, Cat. p. 50. 
Pleurotuchus typicus, Smith, Mag. Zool. Bot. i. 1887, p. 148. 
Gerrhosaurus typicus, Dum. § Bibr. v. p. 383; Smith, Ill. 8. Afr., 
Rept. pl. xxxviii. fig. 2, and pl. xlii. figs. 5-8. 
Head small; body cyclotetragonal. Head-shields smooth; nasals 
slightly swollen ; frontonasal as long as broad, in contact with the 
rostral and the frontal ; a large crescentic tympanic shield, covering 
part of the ear-opening. Dorsal scales keeled, the laterals smooth, 
in 22 or 24 longitudinal and 56 transverse series; ventrals in 10 
longitudinal series. Femoral pores 16 to 18. Tail nearly twice 
as long as head and body. Brown above, sides with squarish light 
spots; a light, dark-edged streak on each side, from the supraoculars 
to the tail. 
millim. millim 
Total length ...... 290 Fore limb ........ 32 
Head orc ween 19 Hind limb........ 50 
Width of head .... 15 Tail. gaa dei gets 190 
Body? ie: ie ot eed ee 81 
South Africa. 
Ad. South of the mouth of the Sir A. Smith [P.]. 
Orange River. (Types.) 
