280 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
drawn from the south end of James Bay near latitude 51° easterly to 
the Gulf of St. Lawrence near Seven Islands in latitude 50°, and from 
there along the shore of the Gulf of St. Lawrence and the Straits of 
Belle Isle to our starting point at Cape Charles. This southern shore 
boundary is something over five hundred miles in length and the 
line from James Bay to the shore is nearly six hundred miles long. 
As will be seen by the map, records from Moose Factory, Godbout, 
Point des Monts, and Anticosti Island are excluded as these places are 
outside of the limits of Labrador. 
The most southern point in Labrador is at the fiftieth degree of 
north latitude on the southern coast near Seven Islands. The most 
northern station is Cape Wolstenholme at about latitude 63° N. 
The most eastern point is Battle Harbor at 55° 32' west longitude, and 
the most western point is Cape Jones on Hudson Bay at longitude 79° 
50' W. 
The total area embraced within the boundaries given above, accord¬ 
ing to Low, is approximately 511,000 square miles. 
Much of this area is practically unexplored. The region lying 
north of Clearwater Lake, the Larch and Ivoksoak Rivers at Fort 
Chimo, has never been visited by white men. It extends from the 
boundary just mentioned in latitude 57° and 58° to the northern 
extremity of Labrador at Cape Wolstenholme, about latitude 63°. In 
this northern region it is probable that certain gulls, ducks, and shore 
birds may be found breeding that are as yet unrecorded for Labrador, 
except as transient visitors. 
Geology .— To A. P. Low we are chiefly indebted for an account 
of the geology of this region. More than nine tenths of the rocks of 
the Labrador peninsula are highly metamorphosed Laurentian rocks, 
gneiss, and schists. The remainder belong in the Huronian and 
Cambrian horizons and occur in scattered areas. “Under the 
name Huronian are included several widely separated areas of clastic 
and volcanic rocks, together with many basic eruptives; these are 
represented by various schists, conglomerates, breccias, diorites and 
other rocks more or less interfolded with the Laurentian. 
“The Cambrian rocks rest unconformably upon the Laurentian 
and Huronian, and are made up of bedded sandstones, argillites, 
shales and limestones, along with bedded traps and other basic intru¬ 
sive or volcanic rocks” (Low, 96 , p. 196). 
Along the southern coast fronting the Straits of Belle Isle extend 
