1. GERRHONOTUS. 278 



twenty-seven transverse series of scales from the head to the base 

 of tho tail. Vcntrals in twelve or foiu'tcen longitudinal series. 

 Yellowish-green above, flanks with vertical brown bands. 

 Mexico. 



10. Gerrhonotus planifrons. 



Gerrlionotus (Barissia) planifrons, liucuurt, Miss. Se. Mex., Rept. 

 p. 301, pi. xxi. c. fig. 1. 



Head-shields quite flat. Dorsal scales in sixteen longitudinal 

 rows, the eight median strongly keeled ; ventrals in twelve. Other- 

 wise as in G. iinl>rieatns. Purplish-brown above, with darker 

 vertical bands on the sides of the neck and body, edged posteriorly 

 with white ; head with whitish dots ; lower surfaces yellow, speckled 

 with blackish. 



Oaxaca. 



11. Gerrhonotus caBiuleiis. 



Gerrhonotus cferuleus, Grmj, Cat. p. 54, 



buruettii, Oray, I. c. 



wiegniannii, Oray, I. c. 



Gerrhonotus Cferuleus, Wieym. Isis, 1828, p. 380, ami Herp. Mex. 

 p. 31; Bocourt, Miss. Sc. Mex., Rept. p. 353, pi. xxi.c. fig. 3; 

 Gilnth. Biol. C.-Am., Rept. p. 38, pi. xxv. figs. A-D. 



burnettii, Gray, Griff. A. K. ix. Syn. p. 64, and in Beecheys 



J^oy., Rept. p. 9(5, pi. xxxi. fig. 2 ; Bocourt, I. c. p. 350, pi. xxi. c. 



Cordylus (Gerrhonotus) midticarinatus, Blainv. Noitv. Ann. Mus. 



iv. 1835, p. 289, pi. xxv. fig. 2. 

 Gerrhonotus multicarinatus, Dum. S,- Bibr. v. p. 404 ; Halloio. Rep. 



U. S. Explor. Surv. R. R. x. part iv. 1859, pi. ix. fig. 1 ; Bocourt, 



I. c. p. 357, pi. xxi. c. fig. 5. 

 Tropidolepis scincicauda, Skilfon, Am. Journ. Sc. (2) vii. 1849, 



pp. 202, 312, pi. — . figs. 1-3. 

 Elgaria scincicauda, Baird c^'- Gir. in Stansh. Exped. Gr. Salt Lake, 



p. 348, pi. iv. figs. 1-3, and U.S. Explor. Exped., Herp. p. 210, 



pi. xxiii. figs. 1-9. 

 principis, Baird S,- Gir. Proc. Ac. Philad. 1852, p. 175, and 



U. S. Explor. Exped., Herp. p. 214, pi. xxii. figs. 9-10. 



formosa, Baird ^' Gir. II. cc. pp. 175, 200, pi. xxiii. figs. 10-17. 



grandis, Baird Sf Gir. II. cc. pp. 170, 212, pi. xxii. figs. 1-8. 



marginata, Hallow. Proc. Ac. Philad. 1852, p. 179, and in 



Sityreave's Exped. Zuni df Color. Riv. p. 114, pi. iii 

 Gerrlionotus webbii, Baird, Proc. Ac. Philad. 1858, p. 255, and U.S. 



Mex. Bound. Surv., Rept. p. 11, pi. xxv. figs. 1-8. 

 ? Gerrlionotus olivaceus, Baird, II. cc. 

 Gerrlionotus (I'lgaria) grandis, O'Shauyhn. Ann. ^- May. N. H. (4) 



xii. 1873, p. 47. 



( ) scincicauda, O' Shauyhn. I. c. 



( ) formosus, O' Shauyhn. I. c. 



( ) principis, O' Shauyhn. I. c. p. 48. 



Head-sliields smooth ; an azygos prscfrontal, very variable in form 

 and size, either completely enclosed between the other pra-frontals 



VOL. II. X 



