lamplugh: mammaltferous gravel at elloughton. 409 
The rough gravel, A, contains some boulders of oolitic 
rocks of large size, one which I measured being, roughly, 3 feet by 
2 feet by 2 feet. The character of these boulders does not often 
favour the preservation of glaciation-marks, but in one or two 
instances I noticed partially-obliterated gTOOves which may have 
been due to ice ; at any rate the size of some of the blocks suggests 
that floating ice was the agent of their transportation, especially 
since the gravel is at a higher level than the oolitic rocks in the 
immediate neighbourhood, from which the boulders may have come. 
Pebbles foreign to the district form only a small proportion of the 
whole, and their size is always small. The bones, etc., do not occur 
in this part of the section, but, as the workmen informed me, among 
the yellow slightly clayey sand B in the lower part of the pit. 
Though the sand, B, contains many pebbles, there is a marked 
difference between it and the overlying rough gTavel, and their 
junction shows a line of erosion and unconformity. However, as the 
whole of the beds are current-bedded and irregular this does not 
necessarily imply anything more than contemporaneous denudation ; 
at the same time, in a low ridge about a mile to the westward, an 
extensive excavation reveals rough current-bedded unfossiliferous 
gravels, much resembling in character those in this pit, and it may 
be that the two gravels are conterminous, and that the sandy bed B 
is the remains of an older deposit. 
The tusk mentioned at the commencement of this paper lay 
exposed in the floor of the pit in stony yellow sand about a foot 
above the bottom-clay. Judging from its size and condition I do not 
think it can have been carried far by running water ; it has more 
probably either been transported from a shore-line by floe ice, or has 
dropped from the floating carcase of the animal. Its length at the 
time of my visit was 90 inches, but the workmen said they had 
broken up about two feet of the thick end before they were aware ; 
and as the apex also was blunted and badly preserved, I think its 
length when deposited cannot have fallen short of ten feet. Its 
diameter was 6 inches at a distance of ten inches from the apex ; 
7 J inches at 20 inches ; 8 inches at 30 ; 8^ at 40 ; and beyond 
this it did not seem perceptibly to thicken. Its curvature was not 
