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Show 246 M. G. A. BOULENGER ON A N E W ENYALIUS. [Feb. 1, 5. Description of a new Species of. Enyalius in the Brussels Museum. By Gr. A. BOULENGER. [Received January 19, 1881.] (Plate XXVI.) In a paper on the collection of Reptiles made in Ecuador, and presented to the Brussels Museum by Consul Emile deVille, I have mentioned ' a specimen of Enyalius, which I identified with E. heterolepis, Bocourt, noticing, however, that the dorsal crest was more elevated in m y specimen than in the typical one. Having reexamined the former, and compared it with examples of the two beautiful species just described by Mr. O'Shaughnessy, viz. E. rnicro-lepis and E. pra?stabilis, I am now convinced that it belongs to a distinct, hitherto undescribed species, which I have the pleasure of naming ENYALIUS OSHAUGHNESSYI, sp. n. (Plate XXVI.) Head broad and rounded, once and two thirds as long as broad, covered with subquadrangular strongly keeled scales, those on the canthus rostralis and the superciliary border a good deal larger and projecting. A small but distinct occipital plate. Loreal region concave, with small, irregular, keeled scales. Temporal region with small convex scales, above with a series of large conical ones ; a few large conical scales near the tympanum. Labial shields 14, equal. Scales of the back and sides of the body small, smooth and slightly keeled, irregularly intermixed with larger but not conical ones. A median dorsal crest of very large conical scales, beginning behind the occiput, and gradually diminishing in height to the base of the tail, where it becomes double and soon vanishes ; the highest of these scales on the neck measure more than the vertical diameter of the ear-opening. A single lateral series of conical scales on each side of the back, beginning at a small distance behind the ear, and extending to the sacral region. There are about 12 longitudinal rows of scales between the dorsal crest and the lateral series, and 30 between the latter and the belly. Scales on the limbs strongly keeled. Scales of gular region keeled ; those of the pectoral and ventral regions as large as those upon the limbs, and strongly keeled. A single femoral pore on each side. Tail compressed, with verticillate, strongly keeled scales, the verticilli composed of five or six rings of increasing size; scales of the lower surface equal and also strongly keeled. Coloration (in the single male specimen). General colour dark brown ; throat and some of the scales of the sides of the body and tail and some of the limbs greenish ; a light rounded spot on each side of the neck, behind the ear ; gular fold black. 1 Bull. Soc. Zool France, 1880, p. 43. |