Poromera. 121 



9. POROMERA. 



Poromera, Bouleng. Cat. Liz. iii, p. 6 (1887) ; Mocquard, Bull. Soc. 

 Philom. (8) ix, 1897, p. 6. 



Head-shields normal. Nostril pierced between the 

 nasal, two postnasals, and the first upper labial. Lower 

 eyelid scah'. Collar distinct. Back with large, plate- 

 like, subimbricate scales with strono- keels formino- con- 

 tinuous lines, sides with small juxtaposed scales ; ventral 

 plates pointed, imbricate, keeled. Digits slightly coni- 

 jDressed, with tubercular lamellaa inferiorly. Femoral 

 pores forming a long series. Tail very long, cylindrical. 



West Africa. 



Apart from the numerous femoral pores, this geuus reproduces the 

 characters of Tachydromus, and has probably been evolved in the 

 West out of Lacerta as the former has in the East ; iDut whereas there 

 is every reason to believe that TacJujdromns is directly derived from 

 Lacerta, the direct ancestors of Poromera would probably fall under 

 the genera Algiroides or Bedriagaia, or both, as expressed l)y the 

 following diagram : 



E. Asia. W. Africa. 



Poromera. 



Pla fijjdacojms. Bedriagaia. 



Tachydromus, Apeltonotus. Algiroides. 



Lacerta. 



1. POROMERA FORDII. 



Tachydromus fordii, Hallow. Proc. Ac. Philad. 1857, p. 48. 



Poromera fordii, Bouleng. Cat. Liz. iii, p. 6 (1887) ; Cliinth. Ann. 

 & Mag. N. H. (6) xvii, 1896, p. 264; Bouleng. Proc. Zool. Soc. 1900, 

 p. 449, pi. xxxi, fig. 1. 



Poromera hangi, Mocquard, Bull. Soc. Philom. (6) ix, 1897, p. 6. 



