| OCR Text |
Show 478 MR. G. A. BOULENGER ON THE [May 18, Sceloporus torquatus poinseitll, Cope, 1. c. p. 402. Sceloporus torquatus cganogenys, Cope, 1. c. Sceloporus torquatus mucronatus, Cope, 1. c. Sceloporus ferrariperezll, Cope, 1. c. p. 400. Sceloporus melanogaster, Cope, 1. c.; Duges, 1. c. p. 114, pl. xii. Sceloporus omlltemanus, Giinth. 1. c. p. 66, pl. xxxii. fig. A. Head-shields smooth or nearly so '; frontal transversely divided and in contact with the interparietal or separated from it by a small azygous shield or by the frontoparietals, sometimes broken up into several small shields ; interparietal as long as broad or slightly longer than broad, much larger than the parietals, which are sometimes divided into two pairs; supraoculars variable, forming a series of four or five tranversely enlarged shields bordered internally by a series of moderate-sized scales (fig. 1, a), or broken up and forming two or three longitudinal series (fig. 1, d); one or two Pig. 1. Head-shields of Sceloporus torquatus. series of small scales separating the enlarged supraoculars from the supraciliaries; two canthal scales, both often in contact with the subnarial2; anterior border of ear with a strong denticulation formed by three or four pointed scales, which are as large as or a little larger than those preceding. 1 Duges observes " En alguuos individuos las he visto como puntuadas y casi rugosas." 2 Such specimens appear to have been described by Cope as with a single canthal. A specimen from Hac. del Bobo has one canthal on one side and two on the other. |
