54 



BULLETIjST 15 4, UNITED STATES jSTATIONAL MUSEUM 



])robably the most primitive modern form of Cnemidophorus. In 

 characters it is intermediate between the other species of the genus 

 and Ameiva ameiva ameiva of the mainland of South America, 

 ahhough presenting certain specializations from Ameiva that are 

 such as to indicate the former existence of an intermediate ancestral 

 type between the two genera. A full discussion of these relation- 



FictuE 11. — Map showing distribution of forms of lemniscatus group 



ships is given under the affinities of murinus (p. 51) and in tlie 

 general discussion at the end of this work (pp. 251-260). 



A7nthensis of Aruba Island is intermediate, both in geographical 

 position and in characters, between the insular r/iurinus and the 

 mainland Icmniscatus. Its brachial scutellation is much coarser than 

 that of typical murinus but much finer than that of typical lemnis- 



