1>00 



G. A. IWULENGÉR 



This species varies much in lepidosis and in colour. Two 

 extreme forms appear to require naming , although they pass 

 into tlie typical form (Tenerilfe, Madeira) by every possible gra- 

 dation. 



A. mr. rudis. Tubercles very prominent, more or less di- 

 stinctly keeled, almost spine-like on the tail, 16 or 18 in a 

 transverse series in tlie middle of tlie body: temple with very 

 distinctly defined enlarged tubercles. Four very distinct wavy or 

 W-slia})ed dark cross-bands on the body, the median sinus 

 Ijordering a light spot. From snout to vent : 88 millim. Fogo 

 (S. Filippo), S. Jago (near Praja). 



B. Forma typica. (Dumér. & Bibr. Erp. Gén. Ill, p. 324). 

 S. Nicolao, Boa Vista, Rombos, S. Jago (Fedra Badejo), Brava. 



C. var. hoettgeri. (Steindachner, Ann. Hofmus. Wien, VI, 

 1891, p. 301). Tubercles fiat and smooth, more numerous and 

 more irregularly disposed, 18 or 20 in a transverse series in the 

 middle of the body; tubercles on the tail not more prominent 

 than on the body; no well-defined tubercles on the temple. 

 Transverse bars on back narrow and irregular , or ill-defined. 

 From snout to vent: 62 millim. Fogo (S. Filippo and Igreja). 



The contrast between examples of the two extreme forms , 

 from the same locality, is very striking. 



19. Tarentola gigas, Bocage. 

 Cape Verde Islands: Ilheo Raso. 



Ag-aniidae. 



20. Agama colonorum, Baud. 



Portuguese Guinea: Bissau, Rio Cassine, Farim. 

 Fernando Po: Punta Frailes, Basile. 



rani d ae . 



21. Varanus exanthematlcus, Bosc. 

 Portuguese Guinea: Bolama. 



22. Varanus niloticus, L. 



Portuguese Guinea: Bolama. 



