82 MR. C. DAWSON: SUPPLEMENTARY NOTE ON [April I914, 



3. Supplementary Note on the Discovery of a Paleolithic 

 Human Skull and Mandible at Piltdown (Sussex). By 

 Charles Dawson, F.S.A., F.G-.S., and Arthur Smith 

 Woodward, LL.D., F.R.S., Pres.G-.S. With an Appendix by 

 Prof. Grafton Elliot Smith, M.A., M.D., V.P.R.S. (Read 

 December 17th, 1913.) 



[Plates XIV & XV.] 



Contents. Page 



I. Geology and Flint-Implements 82 



II. Description of the Nasal Bones and Lower Canine 

 Tooth of JEoantliropus daivsoni, and some Associated 



Mammalian Remains 86 



III. (Appendix). On the Exact Determination of the Median 



Plane of the Piltdown Skull 93 



I. Geology and Flint-Implements. [C. D.] 



Since reading our paper on December 18th, 1912, 1 we have 

 continued our researches in the Piltdown gravel. 



The whole bed is divided into four well-defined strata. The 

 topmost consists of surface-soil, containing pieces of iron-stained 

 subangular flint derived from some ancient gravel, similar to 

 those beneath. This surface-soil also contains a mixture of 

 pottery and implements of various ages. 



Beneath is the second bed of undisturbed gravel, varying from 

 a few inches to 3 feet in thickness. It is from the centre of 

 this bed that the triangular Palaeolithic implement mentioned and 

 figured in our former paper 2 was obtained. It contains rolled 

 and subangular flints similar to those found in the strata above 

 and below, and is mostly pale yellow in colour with occasional 

 darker patches. 



The third bed, though not always present, is well marked, where 

 it does occur, by reason of its dark ferruginous appearance, and 

 chiefly consists of pieces of ironstone and rolled and subangular 

 flints deeply patinated and iron-stained. As in most other beds of 

 this description, the ferruginous colour of the gravel and of the 

 fossils within it often varies in intensity, from a dull pale-brown 

 to a lustrous blue-black, within the space of a few inches, the 

 latter colour being due to the presence of ferrous sulphide of iron. 



1 Q. J. G. S. vol. lxix (1913) pp. 117-44. 



2 Ibid. p. 122, footnote 1 & pi. xvi, fig. 2. I find that my former descrip- 

 tion of these worked flints has been repeatedly misquoted. I took care not to 

 describe these artefacts as of Chellean age ; but, for purposes of comparison, 

 I mentioned the work upon one face of the implements as being similar 

 to those of the Chellean stage, that is, one of culture. How far culture 

 can be ' zoned ' with age remains to be proved, but there must alwaj's exist 

 obvious limitations to such a system. — C. D. 



