1, GERRnOSAtJRUS. 123 



in 20 to 24 longitudinal and 55 to (J-l 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 tlio tail; a pair of narrow light streaks, sonieliines 

 broken up, may run along the middle of the back ; back frequently 

 witli s(iuarish l)lack spots with light central shafts; young with 

 vtrlical black bars on the tlanks ; lower surfaces yellowish. 



millim. millim. 



Total length 305 Fore limb 27 



Head 20 Hind limb 47 



Width of head 15 Tail 230 



Body 115 



South and East Africa (as far north as Sennar). 



a-f. Ad., hgr., & yg. S. Africa. Sir A. Smith [P.]. 



()-h. Yg. S. Africa. 



k, I. Ad. Port Natal. T. Ayres, Esq. [C.]. 



m-o. Ad. Caledon lliver. Sir A. Smith [P.]. (Types 



of G. hibrunii.) 



jy-q, r. Ad. ? 



s. Ad., skeleton. S. Africa. Sir A. Smith [P.]. 



5. Gerrhosaunis typicus. 



Gerrhosaurus typicus, Gray, Cat. p. 50. 

 Pleurotuchus typicus, Smith, Mar/. Zo'ol. Bot. i. 1837, p. 143. 

 Gerrhosaurus typicus, Dum. S,- Bihr. v. p. 383 ; Smith, III. S. Afr., 

 Rept. pi. xxxviii. tig. 2, and pi. xlii. tigs. 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 5G 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 19 Hind limb 50 



Width of head 15 Tail 190 



Body 81 



South Africa. 



Ad. South of the mouth of the Sir A. Smith [P.]. 



Orange River. (Tj^es.) 



