TEIID LIZATiDS OF THE GENUS CNEMIDOPHOEUS 



175 



lion. This indicates that tlicsc scattered |)(>i)idati()ns are structuially 

 ahnost identicaL 



Tithlc sliotriiif/ llic variddou in measurements and in the number of Jemnral pores 

 for nniinldiid si)ecimens of C. tessellatus tessellatu.s 



.\Iea.sureinent (mm., etc.) 



Specimens used 



Jiodv 



Tail'_ 



Total length 



Width of liead 



Hind leg - 



Length of tail as per- 

 centage of total 



length 



Width of liead as per- 

 centage of l)ody 



length 



Hind li'g as ])ercentage 



of body length 



Femoral pores 



California 

 and Lower 

 California 



72 



52-102 



118-263 



173-358 



8. 5-15 



36 69 



68-73. 5 



12 16. 7 



61. 2-76 

 16-24 



Te.xas 



22 



61-95 



112-220 



173-306 



8-13 



45-66 



64-73 



11. 5 16 



64-77 

 18-23 



Arizona 



72 



40-88 



100-225 



140-305 



8-13. 5 



26 60 



69 74. 6 



12. 1 16. 7 



64-79. 2 

 17-24 



The second table presents the measurements, proportions and num- 

 bers of femoral pores of representative series from the islands adja- 

 cent to Lower California. Specimens from Tiburon have been 

 described as " dispariUs and punctilinealis,^'' those from San Esteban 

 as '"'' estehanensh^'''' tho.se from Isla Partida and Angel de la Guardia 

 as " dichersonae^'' and those from Cerros and Natividad as " inuUis- 

 cutafusy It is evident that these figures show no significant differ- 

 ences from island to island nor between any islands and the main- 

 land localities in the first table. It is perhaps worth pointing out 

 here that these figures fail to support Richardson's " discovery " 

 (1915) that there is a decrea.se in tail length and number of femoral 

 pores in the more northern forms of widely ranging species of 

 lizards (such as tessellatus) . 



Table showing the variation in measurements and in the number of femoral pores for 

 island specimens of C. tessellatus tessellatus 



Meas-ureiuent (mm., etc.) 



Tiburon 



Specimens used 



Body 



Tail 



Total length 



Width of head 



Hind leg 



Tail as percentage of total. 



Width of head as percent- 

 age of body length 



Hind leg as percentage 

 of body 



Femoral pores 



35 



37-95 



96-268 



133 361 



9. 5-14. 5 



26-68 



1. 68-77. 5 



12. 6-16. 7 



1. 62-79. 5 

 17-25 



San Esteban 



18 



52-78 



137-223 



192 298 



8-12 



36-53 



71-76 



I. Partida 



Ang. de la 



Guardia 



60 



58-94 



150-264 



213-350 



8-14 



40-60 



69-76 



Smith 



13. 3-17. 3 12. 5 16. 3 



58-75| 

 16-22 



62. 8-76 

 17-23 



1 



44 



114 



158 



6 



30 



72 



Cerros 

 Natividad 



84 



40-93 



166-264 



231-356 



7-14. 5 



27-65 



69-75. 4 



13. 6 12. 3 17. 5 



68j 67. 5-78 

 17-20: 15-23 



