Shell-Bearing Di'ift on Moel Trj/mi.. — Up] mm, 81 
serve to illustrate these successive arrivals of faunas of dififer- 
ent origin in the northeast of North America. 
While thus the Trenton contained a warm water fauna. 
which had its origin in the southwest, the Utica fauna was 
borne to us on the cold current from north Europe, where it 
probably had its fountain-head, as the Paradoxides and Arenig 
faunas had before. It is obvious that these interesting con- 
clusions of Mr. Matthew as to the origin of the Utica fauna 
find a verification in the writer's observations on the exist- 
ence of an ocean current passing from northeast to southwest 
along the south slope of the Adirondack Archaean area in the 
Utica epoch. The writer had supposed that this current had 
taken the course of the present Labrador current, and fol- 
lowed the east coast of the Laurentian continental nucleus of 
Canada. 
EXPLANATION OF PLATE. 
Fig. I. Section at Ingham's Mills: 
(a). Eight feet of Trenton limestone and intercahited slate, the 
latter containing limestone bowlders. 
(b). Typical Birdseye limestone, the vertical columnar fucoidal 
stems, producing the birds' ej'es on the bedding planes, are visible on 
the photograph. 
Fig. 2. Conglomerate, showing the contorted shale and the im- 
bedded limestone bowlders. 
[European aud American Glacial GeoloKV Compared. 1.] 
SHELL-BEARING DRIFT ON MOEL TRYPAN. 
H.v Warren Upham, St. Paul, Mini], 
This series of short papers is designed to describe brief!)' the 
glacial geology of some important or especially interesting 
European areas, or localities, examined by the writer during 
the summer of 1897, and to compare them with similar Ameri- 
can glacial observations and theories. 
Landing in Southampton June 2nd, our party, including 
also my wife and a lady friend, spent the next eight days in 
London, Oxford, and Stratford-on-Avon. June nth we went 
onward by way of Chester, the north shore of Wales, and Car- 
narvon, to Llanberis, a pretty village in a very picturesque 
valley at the north base of the craggy, sharp-peaked Snowdon 
