384 The Amciican Geologist. Juno, i89y 
to the underside of tlie body ; also a description of the carapax, tho- 
rax, t'tC. 
Four plates, showinj^ the different parts of the crust, are given. The 
illustrations are most artistic and faithful. Two restorations, one of the 
undei and another of the up|)er surface of a female oi E. Jisc/ieri axe 
drawn and are very creditable to the artist, G. Wennman. g. f. m. 
Smirniry Report of th' Geolo^^ical Survey Department \of Canixda\ 
for the Year iSq8. By George M. Dawson. Director. 208 pages. 
Ottawa, 1899. Price 10 cents. 
This summary of v^ork done during last year states that sixteen 
parties were engaged in exploration, one being in British Columbia, 
two in the Yukon district, two in Alberta, four in Ontario, one in 
Quebec, two in New Brunswick, three in Nova Scotia, and one in 
Ungava, on the east coast of frludson bay. Concise preliminary re- 
ports of these field parties are here presented, besides statements of 
the progress of invt-stigations in chemical analyses, mining sta- 
tistics, paleontolog}'. zoology, botany, mapping, and publication. 
The aggregate value of mineral products in Canada during 1897 
exceeded $28,000,000. showing an increase of about 2y percentage 
above the preceding year. For 1898, it is estimated that complete re- 
turns will show a further increase of 25 to 30 per cent. During each 
year the advance was largely due to the development of placer gold 
mining in the Klondike region. 
Two borings in search of petroleum are being made in the north- 
ern part of Alberta, its presence being indicated by extensive outcrops 
of "tar sands' on the Athabasca river: but petroleum of commercial 
value has not yet been discovered. 
Placer gold is reported as profitably mined, both by ordinary hand 
work and dredging machinery, on the North Saskatchewan. The 
gold-bearing section of the river reaches about sixty miles above and 
an equal distance below Edmonton. During the years 1895 to 1897, its 
yield has been about $50,000 each year. As the gold on this and other 
rivers does not occur farther west, adjacent to the base of the Rocky 
mountains, it appears to have been brought with the northeastern 
glacial drift, from the Laurentian axis or plateau, or also to be partly 
derived from the Laramie strata of this region, which were found 
by Tyrrell to be slightly auriferous. West of Edmonton, the coun- 
try is generally deeply drift-covered, a part of the boulders being of 
Eaurentian rocks, and others of gray quartzites from the Rocky moun- 
tains, probably indicating, as the reviewer thinks, a confluence of 
glacial currents there from the northeast, north, and west. 
In Ontario, attention has been given to surveys and mapping 
north of the Seine river, around lake Nipigon, and in the Michipicoten 
district; in parts of Quebec and New Brunswick the drift formations 
have been specially studied; and in Nova Scotia mapping has been 
carried forward on coal-mining and gold-mining areas. 
. Northeast of Hudson bay, Mr. A. P. Low has examined the coast 
