1. GERRHONOTUS. 273 
twenty-seven transverse series of scales from the head to the base 
of the tail. Ventrals in twelve or fourteen longitudinal series. 
Yellowish-green above, flanks with vertical brown bands. 
Mexico. 
10. Gerrhonotus planifrons. 
Gervhonotus (Barissia) planifrons, Bocourt, Miss. Sc. Mex., Rept. 
p. 361, pl. xxi. oc. fig. 1. 
Head-shields quite flat. Dorsal scales in sixteen longitudinal 
rows, the eight median strongly keeled ; ventralsin twelve. Other- 
wise as in G@. imbricatus. 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 ceruleus. 
Gerrhonotus ceruleus, Gray, Cat. p. 54. 
burnettii, Gray, 0. ¢. 
wiegmannil, Gray, l. ¢. : 
Gerrhonotus ceruleus, MWiegm. Isis, 1828, p. 880, and Herp. Mex. 
p: 381; Bocourt, Miss. Se. Mex., Rept. p. 353, pl. xxi.c. fig. 3; 
Giinth. Biol. C.-Am., Rept. p. 38, pl. xxv. figs. A-D. 
burnettii, Gray, Griff. A. K. ix. Syn. p. 64, and in Beechey’s 
pts Rept. p. 96, pl. xxxi. fig, 2; Bocourt, 7. c, p. 356, pl. xxi. c. 
4 
g. 4. 
Cordylus (Gerrhonotus) multicarinatus, Blainv. Now. Ann. Mus. 
iv. 1835, p. 289, pl. xxv. fig. 2. 
Gerrhonotus multicarinatus, Dum. & Bibr. v. p. 404; Hallow. Rep. 
U.S. Explor. Surv. R. R. x. part iv. 1859, pl. ix. tig. 1; Bocourt, 
1. c. p. 857, pl. xxi. c. fig. 5. 
Tropidolepis scincicauda, Shilton, dm. Journ. Se, (2) vii. 1849, 
pp. 202, 312, pl. —. figs. 1-3. 
Elgaria scincicauda, Baird §& Gir. in Stansb. Exped. Gr. Salt Lake, 
p. 348, pl. iv. figs. 1-3, and U.S. Explor. Exped., Herp. p. 210, 
pl. xxiii. figs. 1-9. 
principis, Baird §& Gir. Proc. Ac. Philad. 1852, p. 175, and 
U_S. Explor. Exped., Herp. p. 214, pl. xxii. figs. 9-16. 
formosa, Baird § Gir. ll. cc, pp. 175, 206, pl. xxiii. figs. 10-17. 
—— grandis, Baird § Gir. Ul. ce. pp. 176, 212, pl. xxii. figs. 1-8. 
—— marginata, Hallow. Proc. de. Philad, 1852, p. 179, and in 
Sttgreave’s Exped. Zuni & Color. Riv. p. 114, pl. ii. 
Gerrhonotus webbii, Baird, Proc, Ac. Philad. 1858, p. 255, and U.S. 
Mex. Bound. Surv., Rept. p. 11, pl. xxv. figs. 1-8. 
? Gerrhonotus olivaceus, Baird, ll. ce. 
Gerrhonotus (Elgaria) grandis, O’Shaughn. Ann. § Mag. N. H. (4) 
xii. 1873, p. 47. 
( ) scincicauda, O'Shaughn. 1, ¢. 
—— (——) formosus, O’Shaughn. l. ¢. 
—— (——) principis, O'Shaughn. 1. ¢. p. 48. 
Head-shields smooth ; an azygos preefrontal, very variable in form 
and size, either completely enclosed between the other prefrontals 
VoL, Il. i 
