On new Batrachidns and Reptiles. 51 to be more nearly related to the fossil Ch. Marchisonii than i.s Ch. serpentina. Leavino^ out Pomel's Eniydosaurus Meil-heuratice*, from the Oligocene of Auvergne, of which a definition has never appeared, and Laube's imperfectly known Cheli/dra argilLiram f, from tiie Oligocene of 1? )hemia, four species of CheJydra are known, two recent and two fossil. Their principal characters are contrasted in the following synopsis : — Synopsis of the Species. I. Vertebral shields at least two thU'ds the width of the costals ; the length of the outer border of the hyosternal bone leas than that of the inner. Anterior lobe of plastron angular ; bridge very narrow, not more than one tenth of the length of the plastron; two Ijarbels . . 1. serpentina, L. Anterior lobe of plastron angular ; bri Ige comparatively broad, less th;in one ninth of the length of the plastron ; four barbels. 2. Rossii/nonii, Bocourt, Anterior lobe of plastron with nearly parallel sides, truncate in front; bridge compara-tively broad, formed to a nearly equal extent by the hyo-and the hyposternals . 3. Marchisonii, Boll. II. Vertebral shields not much broader than long, not more than two thirds the width of the costals ; bridge compara-tively broad, formed to a nearly equal extent by the hyo-and the hyposternals; the length of the outer border of the hyosternal as great as that of the inner. 4. Dechenii, II v. Mev-t X . — Descriptions of new Datrachians and R'^pliles from North-western Ecuador. By G. A. BOULENGER, F.R.S. C Cecilia nigricans. Teeth moderately large, few (about oiglit on each side of the upper jaw and six on each side of the lower). Snout rounded, very prominent, as long as the distance betweeii the eyes ; latter visible ; tentacle below and a little behind the nostril, on the lower surface of the snout. Body much elongate, its diameter about sixty times in the total len^tli ; * Bull. Soc. geol. France, (2) iii. 18415, p. 372. t Abh. Ver. i.otos, ii. 1900, p. 47. X I regard Chelydropsis curniatit, C. Peters, as based on an older speni--meu of the same species. 4*
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