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Show 1897.] LIZARDS OP THE GENUS SCELOPORUS. 521 a single canthal scale ; anterior border of ear very slightly denticulated. Lateral cervical fold forming a deep pouch. Dorsal scales much larger than ventrals, strongly keeled, sharply pointed, forming eight or nine parallel longitudinal series; 30-33 scales between the interparietal shield and the base of the tail, 7 or 8 corresponding to the length of the shielded part of the head. Lateral scales smaller, slightly larger than ventrals, keeled, obliquely directed upwards and backwards, sharply differentiated from the dorsals. Ventral scales obtusely keeled, pointed, entire. 38-40 scales round the middle of the body. The adpressed hind limb reaches the eye ; tibia 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 cervical pouch. 3-5 femoral pores on each side. Caudal scales nearly as large as dorsals, strongly keeled. No enlarged postanal scales. Fulvous above, sides dark brown ; a yellow dorso-lateral band separating the dorsal from the lateral surfaces; a more or less distinct series of oblique dark-brown spots along each side of the back. Lower parts uniform yellowish in both sexes. Hab. Salvador, Nicaragua. The two specimens examined by m e form part of M . Lataste's collection. 30. SCELOPORUS SQUAMOSUS. Sceloporus squamosus, Bocourt, Miss. Sc. Mex., Eept. p. 212, pl. xviii. bis, fig. 7, and xix. fig. 3 (1874); Cope, Eroc A m . Philos. Soc. xxii. 1885, p. 394; Bouleng. Cat. Liz. ii. p. 238 (1885). Differs from S. slnlferus and fulvus by the presence, iu the male, of enlarged postanal scales: from the former, by the presence of a single canthal scale; from the latter by the absence of keels on the ventral scales. Lower surfaces, in both sexes, yellowish, dotted all over with grey. Hah. Guatemala to Costa Eica. This species is a desideratum in the British Museum. 31. SCELOPORUS UTIFORMIS. Sceloporus utiformis, Cope, Eroc Ac. Fhilad. 1864, p. 177; Bocourt, Miss. Sc. Mex., Eept. p. 208, pl. xviii. bis, fig. 6 (1874); Cope, Proc. A m . Philos. Soc. xxii. 1885, p. 394; Bouleng. Cat. Liz. ii. p. 238 (1885). Head-shields keeled or striated ; frontal transversely divided ; interparietal as long as broad; parietals very small; a series of five or six large transverse supraoculars, bordered inwards by a series of small scales, and separated from the supraciliaries by two or three series; two canthal scales ; anterior border of ear very slightly denticulated. Sides of neck strongly plicate, minutely granular. Ten longitudinal rows of large, highly keeled, shortly mucronate dorsal scales, separated by many lateral series of minute flat scales |