256 The American Geologist. April, 1902. 
forms should not survive. Moreover the modern sharks are highly de- 
veloped in their mode of protecting their eggs, and it is quite possible 
that there was some weak spot in the ontogeny of the early sharks 
which led to their extinction. I. seh 
The Geology of the Northeast Coast of Labrador. REGINALD A. DALY 
(Bull. Mus. Comp. Zool., vol. 38, Geol. Ser. vol. 5, No. 5, pp. 203-270, 
pls. 1-13, February, 1902.) 
This admirable description is based on a cruise made in the suni- 
mer of 1900 by a party organized by Mr. Huntington Adams, 
in a forty-ton schooner. The party embraced, besides the author 
and a crew of four men, Messrs. H. B. Bigelow, L. B. McCormick 
and H. W. Palmer. Owing to head winds and drift ice the objective 
point of the expedition was not reached till Aug. 21, and but two 
weeks could be given to exploration, as the homeward journey to 
St. John’s, on the island of Newfoundland, had to commence. Many 
of the points at which the ship was delayed on the outward trip were 
subjected to hurried reconnoissance, and these were fruitful im in- 
teresting observations. 
Without mentioning here any lees important results of this 
cruise, it will suffice to call attention to Mr. Daly's observations on 
the limit of highest post-glacial submergence. A curve is constructed 
to show the relation of the present warped highest shore line to the 
sea level. It is highest at St. John’s, Newfoundland, viz: 575 feet. 
It descends northward to Gready bay to 260 feet, just south of Ham- 
ilton inlet. It rises to Hopedale to 390 feet, and descends to Nack- 
vak bay to 250 feet, the extreme points being eleven hundred miles 
separate, along the Atlantic coast. Dr. Daly says: “This pronounced 
warping is inconsistent with the view that changes in the position 
of the level of the sea over great stretches of the earth’s surface are 
produced solely by independent vertical movements of the surface 
of the ocean. Along the line on which our observations were made 
there has been unequal positive uplift of the earth’s crust. The force 
responsible for this great piece of work has been applied locally 
and in varying degree. The result is that today the actual distance 
from the centre of the earth of every point on that line is greater 
than it was at the close of the glacial period.” 
Comparing this result with others reached by Low and by De 
Geer as to the region east and southeast of James bay and south- 
ward from Newfoundland, one is led to the conclusion, as remarked 
by the author, that the greatest elevation of the American continent 
in’post Glacial time has been experienced in the region of the cen- 
tral nevé; and that the comparatively greater uplift of the region 
of Newfoundland is connected with the local character of its glacia- 
tion which, according to Chamberlin, was not due to an extension of 
the ice-fields of the mainland, N. HOW. 
. 
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