330 
[B.N.F.C. 
parent localities of definitely-recognised erratics shows a sur- 
prisingly frequent mixture of southern rocks, even in our most 
northerly districts. 
In the drift memoir already referred to (p. 87) Mr. W. B. 
Wright suggests that our records of Mourne granite may be 
really due to the presence of a closely similar Arran rock found 
by him in drift on the basaltic plateau. Our Mourne erratics, 
however, include various dykes identified by Mr. M‘Henry as 
Tertiary intrusions in the Mourne range, one of the most 
distinctive being a pink eurite which he locates near Annalong. 
This we found in many brickfields round Belfast, in several 
places in Dundonald Valley, and on the shores of Strangford 
Lough. Our S.S.W. record is a large composite block of grit 
and Slieve Croob granite, weighing about 9 tons, discovered by 
Miss Andrews and Mr. Stewart on Rough Island, near the 
northern extremity of Strangford Lough, 18 miles distant from 
its home. 
In connection with this question of drift from the south, 
which suggests, a gradual amelioration of the local climate, I 
must not omit referring to an ox skull and vertebra and frag- 
ments of wood found by Mr. Bell in apparently undisturbed 
boulder clay at Springfield brickyard in 1895, an inch and half 
of horn protruded from the clay seven feet below the surface. 
The fragments were submitted to Professor Haddon, F.R.S., 
and Mr. E. T. Newton, of Jermyn Street Museum. 10 Mr. 
Stewart and I subsequently visited the spot with Mr. Bell, and 
collected a bag of clay from the point where the bones were 
found, which was examined by Mr. Wright, but did not yield 
any marine organisms. When we recall the faunal conditions 
of Arctic regions in the present day, where the ice age still 
prevails, there seems no inherent impossibility in the coeval 
existence of animal life and many local icefields. Mr. Maxwell 
Close, Professor King, and many other geologists believed that 
the West of Ireland was relatively higher during the glacial 
10. Proc. B.N.F.C. Report of Geol. Section. Miss Sydney M. Thompson 
(1895-6). p. 304. 
