12 UNITED STATES AND MEXICaN BOUNDARY. 



55. PLESTIODOX GUTTULATUS, Hallow. 



Lam})rosaiiru$ guttulatus, Hallowell, Pr. A. N. Sc. VI, Dec. 1852, 206 

 Plestiodon guttulatus, Hallowell, Pr. A. N. Sc. VII, Dec. 1857, 215. 



3167. San Elziario, Tex. Dr. Kennedy. 



56. ANOLIS CAROLINENSIS, Cuv. 



2988. Victoria, Tex. Dr. Kennedy. 



57. PHYLLODACTYLUS TUBERCULOSUS, Wiegm. 



Plate XXIII, Figs. 1—8. 



Phyllodactylus lubercidosas, Wiegm. Xova Acta, K. L. C. Acad. XVII, i, 241 



No. 3208. Durango, Mex. Dr. T. H. Webb. 



57. SPHAERIODACTYLUS NOTATUS, Baird. 



Plate XXIV, Figs. 29—37. 



Sphaeriodactylus notatus, Baird, Pr. A. N. Sc. Ph. Dec. 1858. 



Sp. Ch. — Scales on back and sides large, equal, strongly carinated; those on belly smaller, smooth, 

 hexagonal. Above light brownish yellow, uniformly dotted above with reddish brown, most distinct on 

 the head, least so on the belly. 



jg^.—Key West, Fla,, Professor Agassiz and Prof. W. H. B. Thomas. Type No. 3215. 



This species, though not an inhabitant of the regions traversed by the Boundary Commission, 

 is introduced for the purpose of illustrating, by its figures, more fully the characters of Steno- 

 dactylus and PhyUodcietylus. 



58- STENODACTYLUS VARIEGATUS, Baird. 

 Plate XXIII, Figs. 9— 27.— Plate XXIV, Figs. 11—19. 



Stenodactylus variegatus, Baird, Pr. A. N. Sc. Dec. 1858. 



Sp. Ch. — Head very broad. Hind foot contained six times in head and body. Above brownish yellow, 

 ith irregular small blotches of light reddish brown, sometimes in broad transverse bands. Edges of 

 eyelids and whole under surface opaque white. 



3217. Colorado desert. A. Schott. — 3211. Live Oak Creek, Tex. Dr. Kennedy. 



59. PLESTIODON OBSOLETUS, B. & G. 



Plate XXV, Figs. 9—16. 



Plestiodon obsolelum, B. & G. Pr. A. N. Sc. VI, Aug. 1852, 129. 

 3133. Western Texas. J. H. Clark.— 3117. El Paso. J. H. 



60. PLESTIODON TETRAGRAMMUS, Baird. 



Plestiodon tetragrammus, Baird, Pr. A. N. Sc. Dec. 1858. 



Sp. Ch. — One post-nasal plate; post-frontal and inter-nasals separated by the post-nasal. Five supra- 

 orbitals. Dorsal scales of equal width. Light olive green above; sides with two yellowish lines, sepa- 



