226 Scientific Intelligence. 
Bridge near Haddersfleld, and proposes for it the name Xylobius 
Woodwardi. 
4, Dr. Dawson on the Post-pliocene Geology of Canada.—The 
four numbers of the Canadian Naturalist for 1872, contain the 
successive parts of an elaborate review of the facts connected 
ith the drift and other post-tertiary deposits in Canada, ‘ 
awson, and mostly from his own observations. e number of 
species of fossils collected from the post-tertiary beds of the St. 
Lawrence and those of the coast of Labrador, enumerated with 
a mention of localities in this paper, is 205; of which 24 are Ra- 
diates, 140 Mollusks, 26 Articulates and 5 Vertebrates, besides 10 
of plants. r. Dawson observes that all, with three or four 
exceptions, are northern or Arctic species, belonging in the case 
of the marine species to depths from the littoral zone to 200 
: ee agate 
some amelioration of climate from the epoch of the oldest of the 
deposits to that of the latest, and yet but little, as the cold La- 
brador current continued to flow into the St. Lawrence Gulf and 
iver 
ver. 
In connection, Dr. Dawson brings out the various arguments 
which appear to him to sustain the Iceberg-theory, and all who 
are studying the subject will be interested in reading them, He 
closes his arguments with one of a personal nature: that certain 
views (which he does not discuss) of the advocates of the glacier 
awson, it is observed that the glacial scratches over 
c 
glacier. This conclusion was further sustained by reference to 
the fact, that while the glacier-mass had a general eouthenst ra 
11 t 
astward down stream. Now Dr. Dawson mentio 
argument in favor of the iceberg-theory, that the scratches 
drift transportation in the vicinity of the St. Lawrence River were 
made by a movement wp stream (such a one as might in his vieW 
have existed if the continent were deeply submerged and the St. 
Lawrence valley opened over the Lake region into the Missi 
