242 J. MAGENS MELLO ON THE BONE-CAVES OE CKESWELL CEAGS. 



character to the bone- bearing bed of the Pin-hole, but differing 

 from it in containing, near its base, patches of highly laminated red 

 clay. Small nodular masses of black oxide of manganese occurred 

 here and there in the sand, and also some quartzite and other 

 pebbles. This middle red sand bed was about 3 feet thick, and 

 rested upon a bed of lighter-coloured sand, containing many rough 

 blocks of limestone already mentioned as apparently forming part 



of the original floor of the cavern. 



Fig. 2 gives a section across the 



Pig. 2. — Section in the Robin-Hood Cave, in line 1, Fig. 1. 



•C;\K\\-*-'.S;'&t??z 







^i^smmz-K. 



+ Stalactite uniting breccia with roof. 



a. Stalagmitic breccia, with bones and implements, 18 in. to 3 ft. 



b. Cave-earth, with bones and implements, of variable thickness. 



c. Middle red sand with laminated red clay at base, containing bones, 3 ft. 



d. Lighter-coloured sand with limestone fragments, 2 ft. ? 



side of the cavern where the thickness of the breccia was greatest. 

 Fig. 3 is another section, taken across the cavern, facing the openings 

 of the chambers, which are shown above the cutting. 



The Breccia. — The Breccia (a) was firmly cemented together by 

 stalagmite, many thick masses of which were interspersed with it ; 

 and the whole deposit was so hard that it had frequently to be 

 blasted in order to remove it and examine its contents. It was found 

 to contain a large number of bones, mostly of small animals, including 

 the "Water-vole ; but together with these were some of the Reindeer, 

 and also teeth of the Hyaena, Rhinoceros tiehorhinus, and Horse. 



