44 JReports and Proceedings — 



resembled those of his South-African genus Trityhdon even more 

 nearly than those of Microlestes and Stereognathiis, with which the 

 latter were compared. The lower molars of Neoplagiaulax have 

 two instead of three longitudinal series of tubercles ; and the author 

 suggested that this may have been the case also in Tritylodon ; and 

 that the detached molars, on which the genus Microlestes is founded, 

 may also belong to the lower jaw. 



2. " On the Discovery in one of the Bone-caves of Creswell Crags 

 of a portion of the Upper Jaw of Kleiphas primigenins, containing, 

 in situ, the first and second Milk-molars (right side)." By A. T. 

 ]\Ietcalfe, Esq., F.G.S. 



The specimen exhibited to the Society and now described was 

 obtained from one of the Creswell bone-caves, before the commence- 

 ment of their systematic exploration by a Committee of the British 

 Association. The bone-caves are in the Lower Magnesian Limestone 

 of the Permian, not far from the southern limit of that deposit near 

 Nottingham. The locality was described, and it was shown that the 

 ravine in which the caves occur has been cut in the limestone by the 

 little river Wollen, which probably began by excavating a cavern the 

 whole length of the ravine. The roof of this cavern must have 

 fallen in, and the minor lateral caverns, in which bone-deposits are 

 found, are now similarly being converted into side ravines. 



The fossil was found in " Pin-Hole Cave," the most westerly on 

 the north or Derbyshire side of the ravine, about six inches below the 

 base of the surface-soil, here four inches deep. The cave has been 

 described in the Society's Journal, vol. xxxi. p. 679, by the Eev. J. 

 M. Mello, who in 1875 obtained from this spot bones of the Arctic 

 fox (Cimis lagopvs). As the manunoth teeth (first and second milk- 

 molars of the upper jaw) occurring in the fossil were wanting in the 

 National Collection, the author has undertaken to present the speci- 

 men to the British (Natural History) Museum. 



3. '* Notes on the Remains of Elephas primigenins from the 

 Creswell Bone-cave." By Sir R. Owen, K.C.B., F.R.S.. F.G.S., &c. 



The author noticed the various descriptions by Cuvier and himself 

 of milk-molars of Elephas primigenius, and pointed out that all 

 hitherto known were found detached. The present is the first 

 known occurrence of the two earliest milk-molars in situ. The 

 specimen discovered by Mr. Metcalfe is a portion of the fore part 

 of the maxilla of a very young Elephant with the teeth of the right 

 side preserved, the corresponding teeth of the left side and their 

 sockets having been broken away. Of the two teeth thus obtained 

 descriptions and measurements were given. The first tooth is much 

 worn, but only the anterior portion of the second has undergone wear, 

 the two hindmost divisions of this tooth not having risen into use. 



It shows that these first teeth of E. primigenius diifer much less 

 from the corresponding milk-molars of the Indian Elephant than 

 the later teeth do, the thickness of the constituent enamel-plates 

 being but little less in proportion, and the principal distinction 

 being the greater relative breadth of the second molar, especially 

 towards the base of the crown. 



