DESCRIPTIONS OF THE PLATES STONE IMPLEMENTS. 6 1 



serve also as rubbers or pestles. There is also one flattish oval pebble of dirty- 

 red jasper, found at La Madelaine, which has been much worn by grinding, 

 having on each face an obliquely flat patch of polished surface. 



In the British Museum are several stone Mortars from Bruniquel. They are 

 irregularly saucer-shaped, larger than any of the hollowed pebbles above 

 mentioned, and consist of roughly dressed blocks of limestone, with a large, 

 oval, shallow depression ground out of one surface. A piece of mica-schist, 

 somewhat like the butt-end, of a pistol in shape, from the same cave, seems to 

 have served as a Pestle. 



Fig. 1. A smooth round pebble of fine-grained grey granite, slightly hollowed 

 on one of its flatter surfaces. The pebble is 3^ inches (89 millimetres) wide 

 in its greatest diameter, and was probably 3^2 inches (79 millims.) thick. The 

 excavation ground out on the top is about % inch (8^ millims.) deep from the 

 original surface, and about -3^- inch (6^ millims.) deep below its present edge, 

 with a diameter of 1-| inch (38 millims.). From the lip of the hollow to the 

 opposite face, the pebble is 2^f inch (73 millims.) thick. 



The old surface of the stone had acquired a pinkish tint, which is seen at the 

 edge of the depression to penetrate the pebble for about ^ inch (3^ millims.); 

 but the hollow itself, as is generally the case with these cupped pebbles, 

 whether of granite or quartzite, has a fresher, rougher, and whiter surface 

 than the rest of the stone, having been made subsequently to the old dis- 

 coloration of the pebble. 



Fig. 2. A smooth subovate flattish pebble of grey granite, with a broad round pit 

 ground out on one of its flat faces. It is rather coarser in grain than the 

 specimen above described (fig. 1). It is noticeable that in this specimen, 

 contrary to what is observed in the specimen described above, the surface both 

 of the pebble and its cup has a dull pinkish tint, due possibly to a ferruginous 

 stain derived from the brown materials of the hearth-stuff in which it has been 

 imbedded. As the bowl or hollow is not more deeply stained than the rest of 

 the pebble, the discoloration can scarcely be due to any ochreous pigment 



has had a little pit chipped out on its surface, and its edge bears the marks of knocking. Possibly in some 

 cases the hollow of the Mortar, also, was commenced by chipping, but was afterwards ground down more 

 smoothly. A small, round, smooth pebble of sandstone (fine-grained, compact, cream-coloured, and slightly 

 micaceous), from Lea Eyzies, has a little pit chipped out on one face. 





