144 IGUANIDJ?. 



Total length 136 millira. 



Hecad 11 



Width of head 8-5 



Body 35 



Fore limb 16 



Hind limb 27 



Tail 90 



5) 

 15 



Chili ; Mendoza. 



C. Darwin, Esq. [P.]. 

 ' Challenger ' Exped. 

 Dr. Coppinger [C.]. 

 C. Darwin, Esq. [P.]. 

 Mr. Bridges [C.J. 



5. Liolsemns stantoni. 



Proctotretus stantoni, Girard, Proc. Ac. Philad. 1854, p. 227, and in 



GilUs, U.S. N. Astron. Exped. ii. p. 221, pi. xl. figs. 13-20. 

 Ptychodeira stantoni, Girard, U.S. E.vpJ. Exped., Herp. p. 347. 



Appears to be very closely allied to, if distinct from, the preceding 

 species. However, it is said to have the ventral scales slightly 

 keeled. Ground-colour deep brown, with a reddish tint j)osteriorly ; 

 two parallel light streaks ou each side ; abdomen uuicolor, with 

 metallic reflections. 



Santiago, Chili. 



6. Liolsemus fuscus. (Plate X. fig. 2.) 



Upper head-scales perfectly smooth ; interparietal a little larger 

 than parietals, in contact with the frontals ; frontoparietals very 

 small and widely separated ; the scale on the upper anterior border 

 of the ear only a little larger than the preceding temporals. Fifty 

 scales round the middle of the body. Otherwise as in X. Jemniscatux. 

 Brown above, with two light lateral bands on each side, the inter- 

 space between them with closely-set blackish-brown spots ; a black 

 vertebral line and small black spots on the sides of the back : lower 

 surfaces brownish, chin and sides of throat mottled with darker. 



Total length 136 millim. 



Head 13 „ 



Width of head 9 „ 



Body 35 ,, 



Fore limb 17 „ 



Hind limb 29 „ 



Tail 88 „ 



Chili. 

 a. c?. Valparaiso, 



