Olive, beneath pale olive, vertebral scales darker, slightly spotted; labial shield pale, dark edged. The dorsal and lateral scales keeled, placed in longitudinal series; the keels continued, equal; chin shields two pairs, long; throat scaly on the sides, shielded in the middle; loreal shields equal; one high anterior, and three small posterior ocular shields; temples shielded; nostrils in the suture between the scales; the anterior frontal narrow, moderate; eyes large, convex, pupil round. Inhabits New Holland, Dr. Mair, 39th Regiment. White, in the Appendix to his Journal, mentions and figures two snakes (n. 1 and 2 page 258) but his descriptions are so short, and his figures so indistinct, compared with what are now required to determine the species of snakes, that I am unable to apply them with certainty to any of the species here recorded. 68. Naja bungaroides, var. Brown. Varied with a few whitish cross bands; last series of scales and beneath whitish ventral shield black in front; subcaudal plates, one-rowed; throat scaly; chin shields two pairs; eyes lateral, pupil round; front pair of frontal plates short; nostrils lateral, in two small shields, loreal shields none; one large anterior, and two moderate posterior ocular shields; lower temporal shield in the labial ones. Scales quite smooth, broad. Inhabits New Holland. Dr. Mair. 69. Trimesurus leptocephalus. Lacepede described this species twice, once as a Boa, and then as a Trimesurus. Mr. Schlegel observes that there is one of Baudin's original specimens in the Leyden collection, and that the scales are not in the least keeled, though Lacepede described them to be so. Lesson believing it to be an undescribed species formed for it his genus Acanthophis; Wagler has also formed two genera for this single species; and Cuvier formed from a variety of it with subcaudal bands a third genus, under the name of Oplocephalus. 70. Trimesurus olivaceus, Gray. Olive-green, scales black; head dark with a black streak along each side, enclosing the eyes and united by a black band across the nape; lips, and beneath white; lips and chin black dotted, front of ventral shields blackish, throat scaly, chin shields two pairs. Under the epidermis bluish green; body elongate, tapering; tail moderate tapering, subeaudal shields one-rowed, longer towards the tip; scales all smooth, imbricated, subequal, rather larger below; head small, rather tapering in front, rounded; eyes rather small, pupil round, head shields normal; the nostrils lateral in the suture between two shields, hinder shield elongate; loreal shields none; one large anterior and two moderate post-ocular shields; labial shields subequal, lower temporal inserted. Inhabits New Holland. Dr. Mair. 71. Calamaria diadema, t. 5 f. 3.