Occasional Papers of the Museum of Zoology g 



dies on the back and nine black rings completely surrounding 

 the tail; limbs and digits with many sharply defined pairs of 

 fine, black lines occurring as rings which do not quite meet 

 on the inner surface. 



Total length of head and body, 132 mm.; tail, 86 mm.; 

 head, 15 mm. 



This most curious and strikingly colored lizard is now 

 pallid white, with many black markings very sharply defined. 

 The absence of flash colors from the pendulous dewlap and 

 the extension out to the very margin of this appendage of the 

 same network of markings that are so unique and surprising 

 a feature of the head and neck is wholly unexpected. The 

 dewlap appears more like that of Iguana in miniature. I do 

 not believe that this type can be considered more primitive 

 or more advanced than any of the other allied genera. Some 

 of the Anoline genera may well have sprung from species of 

 Anolis itself as we know it, but it seems probable that this 

 genus sprung from some common ancestor. The expanding 

 dewlap with a flash-color is obviously desirable, for it is wide- 

 spread and shows large variety of development within the 

 great genus Anolis itself. That type of dewlap presupposes 

 a stylus and muscles to make expansion possible, and the nec- 

 essary accommodation can only be obtained with imbricating 

 scales on rubber}', elastic skin. The appendage in this genus, 

 obviously also a development for purposes of ornamentation, 

 accomplishes its more modest attempt at beautification in a 

 wholly different manner. 



Along the stream beds the diurnal and nocturnal fauna — 

 as might be expected — differed widely. Ameiva undulata 

 quadrilineata and Ameiva f estiva, the latter with a sky-blue 

 mid-dorsal stripe in the young and looking most scinc-like, 

 were about equally abundant. Bufos were common, typhonius 



