55 



through premeiotic endoduplication can acquire and maintain large num- 

 bers of chromosomal aberrations and mutations. The importance of syn- 

 aptic junctions during meiosis no longer exists and each chromosome can 

 evolve independently. New genomes can be acquired through hybridiza- 

 tion without disrupting the reproductive process. Access to increased 

 quantities of DNA can be acquired which can be utilized in evolving new 

 mutations without disrupting the balanced array of genes which success- 

 fully maintain the species. 



1*8. — . 1972. Discussion: the role of environment in the evolution 

 of life history differences within and between lizard species. OCCAS- 

 IONAL PAPERS, UNIVERSITY OF ARKANSAS MUSEUM, No. ^: 93-95. 



Cnemidophorus tesselatus is so efficient in food gathering that 

 just one or two hours of foraging are sufficient for as much as two 

 days. Such efficiency could be an important parameter in a species 

 that must produce several clutches of eggs a season and continue to 

 grow or maintain itself. 



1*9. — , R. G. Beidleman and C. H. Lowe, 3r. 1958. The status of the 

 lizard Cnemidophorus perplexus Baird & Girard (Teiidae). PROCEEDINGS 

 OF THE UNITED STATES NATIONAL MUSEUM 108(3406): 331-3^*5. 



A detailed and very interesting investigation into the following 

 questions; a) what specimen constitutes the type, b) where is the type 

 locality, c) with what species in this area may the name be associated? 

 The type specimen is USNM 3060, collected by William Gambel during the 

 last week of July, 18*1, in the Rio Grande valley southwest of Santa Fe 

 in Sandoval County. A description of the type is given and it is com- 

 pared with the species known from the area. It is concluded that the 

 specimen represents that known as _C. neomexicanus , which is thus synon- 

 ym ized (NOTE: jC. neome>(icanus does not now = C. perplexus; see Wright 

 and Lowe, i967b). 



150. Mecham, 3. S. 1979. The biogeographical relationships of the 

 amphibians and reptiles of the Guadalupe Mountains. ^ BIOLOGICAL 

 INVESTIGATIONS IN THE GUADALUPE MOUNTAINS NATIONAL PARK, 

 TEXAS. Genoways, H. H. and R. J. Baker, editors. National Park Service 

 Proceedings and Transactions Series No. *: 169-179. 



Cnemidophorus gularis , _C. inornatus and _C. tigris are all essen- 

 tially confined to the desert plains below *500 feet; the latter spe- 

 cies has apparently been collected in the immediate vicinity only from 

 mesquite dunes bordering the salt flats to the southwest. _C. exsanguis 

 and _C. tesselatus are common in more open roughland habitats to approx- 

 imately 6000 ft. 



