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Show REPTILES. 39 PLEURODEMA BUFONINUM. Mi/ti. PLATE XVII.-Fig. 5. Dentibus palatinis prominentibus, in fasciculis binis ovalibus, obliquis, dispositis; lingud subcordiformi, subema1-ginata; glandulis lumborum maximis, ellipticis, planis; digitis posticis dimidio fere pabnatis, marginatis; dorso glandulis parvis instructo,fusco-griseo maculis, nigris, linea longitudinali pallidd. Habitat, Port Desire, Patagonia. DESCRIPTION.-Head short. Muzzle rounded. Eyes prominent. Tongue thick, slightly heartshaped, scarcely notched on the posterior margin. Palatine teeth prominent, in two oval groups, converging backwards. Tympanum rather small, perfectly round, conspicuous. Parotid glands distinct. Body thick and broad, with small glandular tubercles dispersed over the surface, particularly at the: anterior part. Lumbar glands extremely large, elliptic-ovate, flat. Legs of moderate length, rather robust. Anterior toes separated, excepting at the base; a small tubercle under each joint, and several very small ones on the palm; hinder toes united to about half their length, and bordered on each side to the extremity ; metatarsal tubercles prominent; soles of the hinder feet with many minute tubercles. CoLOua.-The upper surface of this species is of a brownish grey colour, sometimes greenish brown or dark olive, and with numerous irregular spots of dark-brown or black. Thighs and legs with fascire of the same colour. Beneath yellowish white; in some with numerous blackish dots under the throat. DIMENSIONS. In. Lin. Length of the head and body • .. .. .. .. . .. .. .. .. 8 of the anterior extremities . .. . .. . . . . . . 0 of tho posterior extremities .. .. . .. .. .. . 3 Found by Mr. Darwin at Port Desire, in Patagonia, and high up the river Santa Cruz-" probably," says Mr. Darwin, "the most southern limit for this fami1y." GENus-LEIUPERUS. Bibr. LEIUPERUS SALARIUS. Mi/ti. PLATE XVIII.-Fig. 1. Supra nigricans, lumbis maculis 3 vel 4 nigris, albo-ma1-ginatis. DESCRIPTION.-The head is short, the opening of the mouth small, the tongue rather thick, very slightly emarginate behind, ancl with the posterior margin free. The eyes small; the tym- |