DESCEIPTIONS OP THE PLATES STONE IMPLEMENTS. [A. XXIII.] 109 



Fig. 1. A small, subglobular, smooth pebble of fine-grained siliceous sandstone, 

 dull, drab-coloured, and finely micaceous, on one face of which a round hollow 

 has been chipped out. It is imbedded in a piece of the Hearth-stuff or Bone- 

 breccia, composed, as usual, of stalagmite coloured by carbonaceous matter 

 and enclosing fragments of bones, with small chips of flints, minute flakes of 

 mica, &c. In the breccia, under the pebble, is also seen a piece qf bright-red 

 soft hematite red ochre. [The pebble is rather larger and more oval, longer 

 transversely by 3 millimetres, than shown in the figure.] 

 From Les Eyzies. 



French millimetres. English inch. 



Diameter, long 43 1-693 



short 40 1-575 



From the base of the hollow to the 1 



other face of the pebble J 



Depth of the hollow 4 0-157 



Diameter of the hollow, long 23 0-906 



,, short 21 0-827 



Fig. 2. A water-worn irregular-shaped fragment of softish, friable, grey sand- 

 stone, bearing a part of the natural impression of a Bivalve Shell that had ribs 

 and prickles, such as Spondylus Santonemis ; but the markings caused by 

 the ornament of the shell have been nearly obliterated, either by the natural 

 action of water, or by artificial rubbing, probably by both. Some slight 

 ferruginous stains remain in little hollows in the qavity; but they may be 

 due rather to the imbedding material than to the use of this saucer-like stone 

 as a paint-mortar or ochre-pot. The sandstone is quartzose and glauconitic, 

 with, a calcareous cement ; and, besides the cast of Spondylus, it contains small 

 fragments of Bivalve Shells, with other obscure traces of fossils. Doubtlessly 

 it was derived by natural agency from one of the Cretaceous rocks traversed by 

 the Vezere and the Dordogne ; and indeed it may be from the sandstone near 

 Montignac : see page 31. 

 From La Madelaine. 



French millimetres. English inches. 



Length 70 2-756 



Breadth 60 2-362 



Thickness 35 1-378 



Figs. 3 a and 3 b. An oval pebble of soft, grey, finely micaceous clayslate, worn 

 down (by rubbing) on both faces into nearly flat and very smooth, oblique, and 

 slightly curved surfaces not reaching nearly to the periphery, nor of exactly 



