478 PLEISTOCENE DEPOSITS. CHAP. 



and retains over nearly all the surface the remains of originally 

 complete smoothing, though not the polish. Length, 5 inches; 



Diagram CCVI. Ancient implement. Scale one-fifth of the object. 



7. Greenstone Thick, partly decayed by removal of some of the felspathic portions, 

 and partly incrusted by carbonate of lime, as many objects are found to be 

 in the Oxford gravels. Smoothed over all the surface, broader end polished 

 to a curved cutting edge. 'Found in the river Thames at Vincent, near 

 Wittenham, while dredging gravel, Feb. 21, 1871.' (My collection.) 



extreme breadth at the cutting-edge in front, 2,'i ; greatest thick- 

 ness, T'5. The front edge is arched, sharp, uninjured ; the sides 

 curved toward the smaller end. Calcareous incrustations appear in 

 several parts where decomposition has happened. Weight, 13 '5 oz. 



8 



Diagram, COV1I. Ancient implement. Scale one-fifth of the object. 



8. Soft fine-grained greenstone Of a pale tint, smoothed over all, with edges 

 truncated (as in Fig. 6), the broader end curved, sharp-edged ; uninjured by 

 use. 'Found in the clay of the brick-yard, Shotover Hill, May 21, 1861.' 

 (My collection.) 



A specimen (Fig. 8) almost the counterpart in form of this fine 

 greenstone axe was found near the surface in the clay pits of 



