84 



tends back to 11500 years B.P. Several species of Cnemidophorus ( ex - 

 sanguis , tesselatus , tigris and uniparens ) are common in the present 

 fauna of the area, but the genus is only moderately represented in the 

 fossil fauna. The paleoecology and zoogeography of the region is dis- 

 cussed. 



230. Vanzolini, P. E., 3. W. Wright, C. 3. Cole and O. Cuellar. 1978. 

 Parthenogenetic lizards (4 letters). SCIENCE 201: 1152-1155. 



The first three criticize Cuellar for ignoring data, misunder- 

 standing and misrepresenting facts and discussions that overwhelmingly 

 support the hybrid origin of parthenogenetic Cnemidophorus in favor of 

 his own theory of the spontaneous occurrence of parthenogenesis in hy- 

 brids in areas devoid of the sexual species. Cuellar replys that he 

 did not mean to question the hybrid origin of parthenoforms, only the 

 assumption that parthenogenetic Cnemidophorus arose directly from hy- 

 bridizations without some intervening step(s) and whether or not all 

 hybridization events lead to successful parthenoforms. The possibility 

 of clonal succession over evolutionary time, suggested by Cuellar, is 

 discussed. 



231. Vitt, L. J. 1977. Observations on clutch and egg size and 

 evidence for multiple clutches in some lizards of the southwestern 

 United States. HERPETOLOGICA 33(3): 333-338. 



Data for 2 different populations of Cnemidophorus tigris indi- 

 cate that larger females lay more and larger eggs than do smaller fe- 

 males. There is evidence for multiple clutches in both populations. 



232. — . 1978. Caloric content of lizard and snake (Reptilia) eggs 

 and bodies and the conversion of weight to caloric data. JOURNAL 

 OF HERPETOLOGY 12(1): 65-72. 



Data on caloric, ash and water content of eggs and bodies of 

 Cnemidophorus tigris , _C. inornatus , _C. sonorae and _C. uniparens are 

 presented. Formulae for the conversion of all other data to caloric 

 content and the application of such data to future lizard energetic 

 studies are discussed. 



233. — . and R. D. Ohmart. 1977. Ecology and reproduction of lower 

 Colorado River lizards. II. Cnemidophorus tigris (Teiidae), with 

 comparisons. HERPETOLOGICA 33(2): 223-234. 



Data are presented for one activity season. The habitats with 



