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Show 1897.] LIZARDS OP THE GENUS SCELOPORUS. 507 connecting dorsals with brachials ; dorsal scales keeled, pointed, with a well-pronounced notch on each side of the point, 47 to 51 scales between occipital and tail, 9 to 11 in a head length; femoral pores 16 to 18 on each side, not meeting medially ; tail about eight times the length of the head ; distance between base of fifth toe and extremity of fourth, including claw, less than distance from nostril to arm, and much more than from snout to posterior margin of ear; no colour bands across nape; no longitudinal colour bands ; males with dark blue patches on flanks and one on each side of throat; females similarly marked, but colours less vivid and less extended." Total length 199 millim.; head to occiput 15 ; snout to vent 75 ; fore limb 34 ; hind limb 52. Hab. Painted Desert, Arizona. 18. SCELOPORUS GRATIOSUS. Sceloporus gratiosus, Baird & Gir. Proc. Ac. Philad. 1852, p. 69, and in Stansb. Expecl. Gr. Salt Lake, p. 346, pl. v. figs. 1-3 (1852); Cope, in Hayden's Eep. U.S. Geol. Surv. Montana, p. 468 (1872), and Proc. Am. Philos. Soc. xxii. 1885, p. 395; Bouleng. Cat. Liz. ii. p. 230 (1885); Giinth. Biol. C. Am., Eept. p. 71 (1890); Stejneger, N. Am. Faun. no. 3, 1890, p. Ill, and no. 7, 1893, pt. ii. p. 183. Sceloporus gracilis, Baird & Gir. Proc. Ac. Philad. 18">2, p. 175 Girard, U.S. Explor. Exped., Herp. p. 386, pl. xx. figs. 1-9 (1858); Bocourt, Miss. Sc. Mex., Eept. p. 190, pl. xviii. fig. 4 (1874). Sceloporus jalapce, Giinth. I.e. p. 74. Sceloporus vandenburglanus, Cope, Amer. Nat. 1896, p. 834. Head-shields smooth; frontal transversely divided, in contact with the interparietal or separated from it by the frontoparietals; interparietal large, broader than long; parietals small or broken up into scales; four to six transversely enlarged supraoculars, bordered inwards by one series of scales and separated from the supraciliaries by two or three series ; four or five slightly enlarged pointed scales form a denticulation on the anterior border of the ear. Dorsal scales small, a little larger than ventrals, strongly keeled, pointed or slightly mucronate, forming parallel longitudinal lines ; 52-56 scales between the interparietal shield and the base of the tail, 11-16 corresponding to the length of the shielded part of the head. Lateral scales a little smaller than dorsals, keeled, directed obliquely upwards and backwards. Ventral scales smooth, more or less distinctly bicuspid. 50-58 scales round the middle of the body. The adpressed hind limb reaches the ear or between the shoulder and the ear ; tibia as long as or slightly longer than the shielded part of the head; the distance between the base of the fifth toe and the extremity of the fourth equals the distance between the end of the snout and the anterior extremity, or the middle of the collar-fold. Eemoral pores 14-18 on each side. |