Forebrain and Midbrain of Lizards 
57 
Figure 22. A. Dendrogram illustrating phyletic relationships recently summarized by Underwood (1971). 
Dendrogram is author’s rendering of Underwood’s summary classification scheme. B. Dendrogram illustrat- 
ing possible phyletic relationships of lizards based on analysis of brain characters presented in present 
study. These new characters support the major conclusions regarding family relationships reached by 
Camp. The major differences relate to suggested placement of teiids and varanids, and recognition of 
new subdivisions, the lacertomorphs and dracomorphs. (Figure 22B after Northcutt and Senn, in prep- 
aration.) 
