18 
TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
reached in the southern end of the chamber there were slight 
remains of a partial stalagmitic floor. 
The material of the lower filling varied somewhat, but still 
presented the character of a regular series. At the bottom of the 
chamber there were small stones and chocolate-coloured clay. 
Immediately above the stones were larger, and with less earthy 
matter ; and there were portions where the stones were larger still, 
and practically free from earth. The longer axes of the stones 
followed the slope of the talus. 
Northward this deposit passed into the mass of granular 
stalagmitic-breccia, which filled the end of the fissure to an 
ascertained depth of fifteen feet, underlying the bone -breccia 
which had proved so rich, but, save in its upper portions, being 
itself all but barren. Nor was the quantity of bones found 
in the lower part of the northern chamber large. Moreover, they 
were, as a rule, thinly scattered, except in one spot, which yielded 
the remains of hares, rabbits, smaller rodents, and birds. This 
fact suggested that when the main opening to the lower part 
of the chamber had been closed, there still remained an aperture, 
