3 g 4 SCIENCE PROGRESS 



Cumnor hill, two or three miles south fewest of Oxford 

 f«6 ft above the Thames). In the gravels of all these locah 

 ties, including Wolvereote, I have found glared boulder. 

 At Picket's Heath Farm the gravels acquire th charac* s 

 of a boulder clay, and afford numerous erratics many o these 

 consist of igneous rocks, such as spheruht.c rhyohte and 

 rhyolitic brefcia, wh.ch must have come from a cons.der bk 

 distance, and yet retain a subangular character and present 

 flattened faces scored with glacial striae atr ; ate A 



The contorted gravel at Wolvereote has afforded striated 

 pebbles of quartzife, and from the gravel "tip" thrown ou 

 by the workmen a large subangular striated boulder of ■gneoos 

 rock was obtained, the glacial markmgs of which were suffi- 

 ciently well marked to carry conviction to so critical an observer 

 as the late Sir John Evans. 



Whether the deposits on Cumnor hill are contemporaneous 

 with those of Wolvereote may be regarded as ^ open question 

 but in any case evidence of glacial action exists at both ol 



'^TVeTmprements discovered by Mr. Bel, are bouchersof 

 large size possessing special characters of their own they 

 are certainly not Chellean ; in the excellence of their work 

 manship they are allied to the Acheulean, from which however 

 thev differ in form, since most of them present a flat face 

 on one side, and are thus, as Sir John Evans expresses .t, 

 " shoe-shaped" (fig. 2). Some rare ovate f°™s °«urw th 1 hem, 

 which may be paralleled with similar forms of Acheulean age, 

 and 1 to This age the whole assemblage may with great probability 



be assigned. 



WeTave seen already that the Acheulean is yon ger than 

 the great chalky boulder clay (glacial stage III.?), and this holds 

 good for the Wolvereote implements, which may indeed ^be 

 even slightly younger than the Acheulean. But the Wolver 

 o e implements are older than the contorted gravels (glacia 



stage J?), and may therefore «^™g tZilts 

 third (i\ interdacial episode. 1 he associaieu wun 

 EUpMsp^iglius, Ea-lus caballus, Bos priscus, Cervus claphus, 



and A ft::na(lonf Jtrrn and cold climates seem to have been 

 the ^during the Pleistocene epoch. These were sometimes 

 more contrasted (glacial and gemal), sometimes less (beds w.tn 



