1. GERRIIOSAURrS. 121 



1. Gerrhosaurus validus. 



Gerrhosauriis vallidu3 (Simd.), Smith, III. S. Afr., Rept., App. p. 9 ; 



Peters, CEfi-ers. Vet. Akad. Fork. 1809, p. 6o9. 

 robustas, Peters, Man. Berl. Ac. 1854, p. 618, and Raise n. 



Mossamb. iii. p. 58, pi. ix. 



Head and bodj' much depressed. Head-shields striated ; fronto- 

 nasal broader than long, not touching the rostral ; praefrontals in. 

 contact, forming a long suture : a large, crescentic tympanic scale, 

 partly covering the ear-opening. Dorsal shields feebly serrated 

 posteriorly, tri- or quinquecarinate, in 26 or 30 longitudinal and 52 

 or 53 transverse series (from the parietal sliields to the base of the 

 tail); ventrals in 14 or IG longitudinal series. Femoral pores 18 

 to 21 on each side. Tail nearly twice the length of head and body. 

 Blackish brown above, each dorsal scale with a small yellow spot 

 or short streak ; in some specimens a yellow band extends along 

 each side of the back; lower surfaces brown, throat and breast 

 lighter. 



millim. millim. 



Total length 513 Fore limb 58 



Head 36 Hind limb 75 



Width of head 30 Tail 335 



Body 142 



South and South-east Africa. 



a. Ad. Near the sources of the Orange Sir A. Smith [P.]. 



River. (Type.) 



b. Ad. Tette, Mozambique. Sir A. Smith [P.]. 



2. Gerrhosauriis major. 



Gerrhosaiirus major, A. Dum. Cat. Meth. Rept. p. 139; Peters, 

 Reise n. Mossamb. iii. p. 58. 



Head and body feebly depressed. Head-shields rugose ; fronto- 

 nasal broader than long, its point in contact with the rostral : prae- 

 frontals in contact, forming a long suture ; a narrow, band-like 

 shield on the anterior border of the ear-opening. Dorsal shields 

 slightly rugose, strongly keeled, in 18 or 2iJ longitudinal and 32 

 to 34 transverse series : ventrals in 10 longitudinal series. 11 to 

 14 femoral pores on each side. Tail a little longer than head and 

 body, slightly compressed in its posterior half. Fulvous-brown 

 above, yellowish infcriorly. 



