The only reptile heretofore known from San Martin is a gopher snake found by Dr. Streets. The Academy has also specimens of two species of lizards from the island, both of which are here described as new. The _Uta_ probably is confined to the island, while the _Gerrhonotus_ seems to be found throughout the San Diegan Fauna. =1. Uta martinensis= sp. nov. PLATE VI. _Diagnosis._--Similar to _U. stansburiana_ but larger; fifth toe reaching to or beyond end of second; dorsals imbricate, mucronate, strongly keeled; scales on upper surfaces of arm and thigh keeled; scales of ear-denticulation longer than the longest diameter of largest temporal; caudals large, imbricate, strongly keeled and mucronate. _Type._--Adult male, Cal. Acad. Sci. No. 4698, San Martin Island, Lower California, Mexico, R. H. Beck, May 3, 1903. _Description of the Type._--Body and head considerably depressed; snout low, rounded; nostrils large, opening upward and outward nearer to end of snout than to orbit; head plates large, smooth, nearly flat, interparietal largest; frontal divided transversely; 3 or 4 enlarged supraoculars, separated from the frontals and frontoparietals by 1 series of small plates; superciliaries long, narrow and projecting; central subocular very long, narrow and strongly keeled; rostral and supralabials long and low; 6 supralabials; symphyseal small, followed on each side by a series of 5 or more large plates which are separated from the infralabials by 1 or 2 series of sublabials; gular region covered with smooth, hexagonal or rounded scales changing to granules on the sides of the neck and to larger imbricate scales on the strong gular fold, largest on the denticulate edge of gular fold where larger than scales on belly; a group of enlarged plates in front of ear-opening; ear denticulation very long, of 3 scales, largest exceeding in length longest diameter of largest plate in front of ear; back covered centrally with nearly uniform imbricate, keeled scales which change gradually to granules on neck and sides of body, and become mucronate posteriorly; scales largest on tail, strongly imbricate, strongly keeled and mucronate above and on sides; posterior surfaces of thighs and arms covered with small granular scales similar to those on sides of body; other surfaces of limbs provided with imbricate scales, keeled on upper surfaces of arm, forearm, thigh, leg, and foot; adpressed fore limb not reaching insertion of thigh; fifth finger reaching about to end of second; fifth toe reaching to or beyond end of second; femoral pores 15; 17-23 of largest dorsals equaling shielded part of head.