368 TEIIDS. 



Cnemidophorus marmoratus, Baird ^- Gir. Proc. Ac. Philad. 1852, 



p. 128. 

 gracilis, Baird 8f Uir. I. c. p. 128, and U.S. Mex. Bound. Siirv. 



ii., Bept. pi. xxxiv. figs. 7-14. 



undulatus, Halloio. Proc. Ac. Philad. 1854, p. 94, and Bep. U.S. 



JExpIor. Surv. B. B. x. part iv. 1859, p. 8, pi. ix. fig. 2. 



tessellatus, Baird, Bept. U.S. Explor. Surv. B. B. x. pt. iv. 



p. 18. 



Ameiva sackii, Cope, Proc. Ac. Philad. 1862, p, 23. 

 Cuemidopliorus melanostetlius, Cope, op. cit. 1863, p. 104. 

 sexlineatus, var. sackii, Bocourt, Miss. Sc. 3Iex.,^Bept. p. 276, 



pi. XX. c. fig. 6, 



sexlineatus, var. grahaniii, Boc. I. c. p. 277, pi. xx. fig. 8. 



sexlineatus, var. tessellata, Gihith. Biol. C.-Am., Bept. p. 26. 



Head moderate. Three parietals ; four supraoculars ; seven 

 supraciliaries ; no frenoorbital ; median gular scales gradually en- 

 larged ; mesoptychium with three or four rows of enlarged scales, 

 the posterior largest, scarcely or not larger than the largest gulars ; 

 the mesoptychial scales forming the border of the collar or separated 

 by one row of granules. Dorsal granules small, smooth. Yentral 

 plates in eight longitudinal rows, those of the outer row largest of 

 all ; thirty-one to thirty-three transverse rows. Three large prae- 

 anals, forming a triangle. Four or five rows of brachials, anterior 

 largest, continuous with the postbrachials ; antebrachials continuous 

 with brachials, in three rows, the outer of which is the largest, the 

 median the smallest ; slightly enlarged scales under the forearm. 

 Eight to ten rows of femorals, one of which is large ; tibials in three 

 rows, outer largest. Femoral pores nineteen to twenty-two. Caudal 

 scales broad, very oblique, with straight keels, slightly pointed 

 posteriorly. Olive-grey above, spotted or marbled with black, with 

 or without more or less defined light longitudinal lines ; lower sur- 

 faces yellowish, the beUy spotted with black. 



millim. millim. 



Total length 450 From end of snout to fore 



Head 38 limb 57 



AYidth of head 25 From end of snout to vent 140 



From end of snout to inter- Fore limb 50 



parietal plate 27 Hind limb 93 



"Width at posterior corners Tail 310 



of supraocular regions . . 14 



South-western North America. 

 a,h. S • ^ California. 



6. Cnemidophonis mariarum. 



? Cnemidophorus grahamii, Baird ^- Gir. Proc. Ac. Philad. 1852, 



p. 128, and U.S. Mex. Bound. Snrv., Bept. pi. xxxii. figs. 1-6. 

 Cnemidophorus mariarum, Gilnth. Biol. C.-Am., Bept. p. 28, pi. xx. 



Head narrow. Nostril anterior to nasal suture. Three parietals ; 

 four supraoculars ; seven supraciliaries ; a frenoorbital ; median 



