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* 



