brqwrtdge: bqulders.incoal measures at WORTLSy. 407 
Prof. Bonney inllis presidential address to the Geological section 
of the British Association at Birmingham in 1886 described several 
boulders found in coal, the examination of which he rightly considers to 
be of great value from the light they may throw upon the physical 
conditions existing in the carboniferous period. 
The reason why these stones are thus found located in such 
peculiar positions can only at present be surmised, as the subject 
is at present rather vague ; but the theory has been adduced that 
they have been carried down to their present position by masses of 
floating vegetation in a manner similar to that recorded by travellers 
on the Amazons, &c., where, in the swamps and shallows such masses 
are seen floating, carrying foreign matter along with them. It has 
also been suggested that there have been circumstances analagous to 
those at present in Siberia where the plains — something like the old 
coal-measure plains — are surrounded by lofty ice-covered mountains, 
and boulders are borne into these plains by glaciers. A leading 
London newspaper recently reported a similar specimen and alleged 
it to be a meteorite. This singular idea although thus made popular 
is however untenable. 
ON A MAMMALIFEROUS GRAVEL AT ELLOUGHTON IN THE 
HUMBER VALLEY. BY G. W. LAMPLUGH. 
Hearing last May that a large bone had been found in a gravel 
pit at Elloughton near Brough-on-the-Humber, I went at once to 
examine the place. The ' bone ' proved to be a mammoth's tusk of 
large size, and on enquiry I learnt that the pit had yielded many 
other bones and teeth, but as they were all badly preserved the 
workmen had taken little care of them. This seems to be a new 
locality for mammalian remains, though it has long been known that 
they occur in the gravels w^hich lie between the chalk and the boulder- 
clay at Hessle six miles to the east of Brough, and also in a deposit 
of doubtful age at Bielbecks, seven miles to the north. 
The pit, which had been open about twelve months, is excavated 
into the top of a small isolated hill known as Mill Hill, and as there 
has since been a continuous removal of the material, a good section 
