QUATERNARY FAUNA OF GIBRALTAR. 97 
pital groove and ridges and the great tuberosity being lost. The part of the bone at 
which they were attached is crushed into numerous fragments, probably by the fall 
Fig. 3. 

Rhinoceros megarhinus. 
Fig. 4. 

Rhinoceros keitloa. 
upon the bone of a heavy fragment of rock; the fragments, however, although much 
displaced, are solidly united by red calcareous stalagmite. The shaft is also broken 
across transversely about five inches below the summit of the articular head; and the 
two portions of the bone were found at a considerable distance apart. At the lower 
end the shaft is fractured very irregularly ; but there is no appearance anywhere of the 
bone having been gnawed by the Hyena. ‘There is a small incised mark close to the 
lower end; but this appears to be quite recent. 
The fragment, as it is, is about 11 inches long; and the least circumference of the 
shaft, at the point where it is usually smallest, is about 8""7. The proximal articular 
surface is very nearly entire. It measures about 4"-2 in the transverse, and about the 
same in the antero-posterior direction}. The radius of its curve is 2'0. 
The injured condition of the bone precludes the possibility of ascertaining very 
precisely any of its characters. 
It may be remarked, however, in comparison with a humerus of R. bicornis (R. 
‘ In R. bicornis the antero-posterior measure is 4-6, and the transyerse 3-9 or 4”-0. 
