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PROCEEDINGS OF THE NATIONAL MUSEUM 



Table 7. — Relationship between head bohhing and shifts in position in females and 



young males 



*Plus one instance of step bobbing. 



Table 8. — Occurrence of head bobbing in dispute situations among females and 



young males 



position and did so whether it had moved to chase away another 

 A. lineatopus, flee from one, or catch something to eat. Juveniles 

 and young males bobbed as frequently as did females and in a similar 

 manner. In dispute situations the winning or dominant lizard usually 

 bobbed, the loser or subordinate seldom did so. 



In A. lineatopus bobbing is not a subordinate gesture nor a signal 

 of female sexual receptivity. It is probably not an aid to depth 

 perception. Bobbing probably serves to advertise (or assert) the 

 presence of the displaying A. lineatopus to others in the vicinity. 

 It would thus serve much the same function in Anolis lineatopus that 

 it does in Sceloporus undulatus and Agama agama. Presumably it is 

 also analagous to the singing of territorial birds and the sign posting 

 of many mammals. 



Dewlapping: The dewlap is flashed — extended to its maximum, as 

 a gular fan, exposing the yellow and orange skin between the more 

 duUy colored scales — several times in sequence and then relaxed. In 

 Evans' (1953a) terminology there are 5-12 flashes per volley. The 

 dewlapping display is given by adult males (very occasionally by 

 subadult males, see page 54). This display is commonly seen and is 



