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ON A NEW SPECIES OF ZELTGLODONT. 309" 18. A Description of New Species of Zeiiolodout and of Leatherj Turtle from tlie Eocene of Soutliern Nigeria. By C. W. Andrews, D.Sc, F.R.S. (British Museum. Natural Histor}^. (Published bj permission of tlie Trustees of the British Museum.) [Received April 29, ]919 : Read June 17, 1919.] (Plates I. & II.*) Two small collections of vertebrate remains from the Ombialla District of Southern Nigeria liave recently been received by the British Museum, one having been sent by Sir Frederick Lugard, CI.C.M.G., the other by Sir John Eaglesome, K.C.M.G. Tlie sternum of a large carinate bird included in the latter collection has already been descinbed f, and it is now proposed to give a short account of some remains of a Zeuglodont Whale and of a Turtle belonging to the so-called Athecate group. Pappocetus LUGARDi, gen. et sp. no v. Portions of the lower jaws of a Zeuglodont are included in both collections, and, although in both cases incomplete, the specimens to some extent supplement one another, so that the structure is fairly clear. The most complete specimen (M 11414, referred to as specimen A) consists of the imperfect left ramus wanting the articular and angular regions, but united with a considerable portion of the anterior region of the right I'amus including the hinder part of the symphysis (PI. I. fig. 1). Por-tions of five teetli are preserved on the left side and of two on the right. The bones were embedded in an intensely hard pyritous clay, including many fragments of molluscan shells. This may be regarded as the type-specimen. The other specimen (M 11086, specimen B) is a left ramus of a mandible broken into three pieces (text-fig. 1). The anterior of these bears the sockets for the incisors, canine, and front half of the single-rooted pm^. Behind this a length of about 2-5 cm., which must have carried the posterior half of pm^ and anterior half of pm^, is wanting. The length mi.ssing is estimated by com-parison with specimen A, which belonged to an individual of nearly the same size. The two other fragments unite below, but, unfor-tunately, the portion of the alveolar border bearing pm^ is lost. The hinder piece bears the basal portion of the very large pm^, and following this without interval are the three molars, of which the first is nearly complete, the second is I'epresented by the roots only, while the third, which had not yet emerged, has been exposed by cutting away the bone ; tlie articular and angular regions are missing. * For explanation of the Plates see p. 319. t Proc. Zool. Soc. 1916, p. -519. 90*

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A Description of new species of Zeuglodont and of Leathery Turtle from the Eocene of Southern Nigeria

Proceedings of The Zoological Society of London 1919: 309-319 (1919)

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