31* 



No significant differences in allele frequency were found at 26 allo- 

 zyme loci exannined. This is the most polymorphic and heterozygous of 

 the 21 lizard species so far examined (35%; mainland species only). A 

 general trend is apparent. Fossorial lizards have uniformly low levels 

 of heterozygosity (ca. 1%), territorial "sit and wait" predators are in- 

 termediate (ca. 5%), and highly vagile apparently nonterritorial species 

 are most heterozygous (ca. 10%). If this trend is of biological signi- 

 ficance, it can be explained by (1) the niche width variation hypothesis 

 which predicts higher variability in populations where individuals are 

 exposed to large-scale environmental heterogeneity (in reality, compari- 

 son of "niche widths" among the diverse lizards used in this study is 

 difficult at best, and no data is available), and/or (2) the population 

 size or gene flow variation hypothesis, which predicts that, all other 

 things being equal, vagility would tend to increase the effective popu- 

 lation size by reducing inbreeding, which would promote higher levels of 

 genetic variation. 



92. Gundy, G. C, C. L. Ralph and G. Z. Wurst. 1975. Parietal eyes 

 in lizards: zoogeographical correlates. SCIENCE 190(^215): 671-673. 



The parietal eye is important for reproductive synchronization and 

 thermoregulation in lizards. There is a general trend of low-latitude 

 restriction of parietal-eyeless lizards. The Teiidae are parietal-eye- 

 less and centered on the equator where 18 of the 31 genera overlap. The 

 genus Cnemidophorus ranges northward to ^13^ latitude (it is interesting 

 to note that many of the northernmost species are parthenogenetic). 



93. Hadley, N. F. and D. C. McCaleb. 1977. Changes in lipid com- 

 position of oocytes during vitellogenesis in the parthenogenetic lizard 

 Cnemidophorus uniparens (Reptilia, Lacertilia, Teiidae). JOURNAL OF 

 HERPETOLOGY 11(4): ^U-^U. 



The amounts and fatty acid composition of the main lipid classes 

 for pre- and post-ovulatory oocytes of lizards from Graham County, Ari- 

 zona, were determined and discussed in relation to thermal regime, mode 

 of reproduction, and diet. 



9'*. Hamilton, D. W. 1964. The inner ear of lizards. I. Gross 

 structure. JOURNAL OF MORPHOLOGY 115(2): 255-272. 



Cnemidophorus tesselatus is among the species used in a general 

 account of the variation in gross structure that occurs witihin and be- 

 tween lizard families. 4 groupings based on this variation are discern- 

 able; _C. tesselatus is somewhat intermediate between the Lacertid and 

 Gekkonid clusters. 



