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Show 144 ON LIZARDS FROM THE MUSEUM OF HALLE. [Mar. 19, lamellae. Head covered with large granules anteriorly, posteriorly with minute granules intermixed with round tubercles; rostral quadrangular, nearly twice as broad as long, with median cleft above; nostril pierced between the rostral, the first labial, and three nasals; eight or nine upper and six lower labials ; mental trapezoid, followed by three transverse series on enlarged flat granules. Body covered above with small granules and large trihedral tubercles, which are about as broad as long, and form sixteen longitudinal series. Abdominal scales large, cycloid, imbricate, smooth, in sixteen longitudinal series in the middle of the body. No femoral or prae-anal pores. Tail cylindrical, with rings of large keeled tubercles. Pale brown above, with seven darker transverse bands separated by narrow interspaces; a dark band on each side of the head, from the nostril,through the eye, to above the ear; tail with five dark-brown cross bands ; lower surfaces white. millim. From snout to vent 15 Head 17 Width of head 10 Fore limb 19 Hind limb 27 Tail 59 A single male specimen from Mendoza. Closely allied to G. fasciatus, but differing in the larger granules on the forehead, the larger ventral scales, and the absence of regular chin-shields. 6. UROSTROPHUS SCAPULATUS. (Plate XV. fig. 2.) Leiosaurus scapulatus, Burmeister, Reise La Plata, ii. p. 522 (6)' Leiosaurus multipunctatus, Burm., ibid. p. 524 ( $ )• Leiosaurus marmoratus, Burm., ibid. p. 524 (young). Head once and two fifths as long as broad; snout rounded, with very short canthus rostralis ; nostril nearer the end of the snout than the orbit; tympanum oval, larger than the eye-opening ; upper head-scales smooth, smallest on the supraorbital region, in two or three series between the orbits ; occipital not enlarged; a series of enlarged infraorbitals, second largest; eleven upper and as many lower labials. Gular scales small and granular, enlarged and flat near the labials and in front of the gular fold. Body subcylindrical; scales on upper surface very small, granular, of lower surfaces flat, slightly imbricate, all smooth. The adpressed hind limb reaches the ear in the male, the gular fold in the female. Tail as long as or slightly longer than head and body, not curly, covered with verticils of small, squarish, smooth scales. Pale olive above, uniform in the male, black-spotted in the female and young ; tail with more or less distinct darker rings ; lower surfaces whitish, throat of female spotted with black ; a black vertical bar in front of the shoulder. |