252 The American Geologist. Aprii, 1902. 
forms in the Pottsville conglomerate flora-Millstone Grit; the latter 
finds in it many Coal Measure series. 
This article of Dr. Matthew's is written to show the stratigraph- 
ical objections to this view of the age of the “St. John plant beds,” 
viz: that they are of the age of the Millstone grit ot the Coal Meas- 
ures. . . 
Sections are given showing the relation of the plant beds to the 
overlying Mispec terrane and the Lower Carboniferous terrane, both 
of which underlie the Millstone Grit, as that term is used and under- 
stood in the maratime provinces of Canada. 
Om de senglacial og postglacial nivaforandriger i Kristianiafeltet (Mol- 
luskfaunan). Norges geologiske undersogelse, No. 31, pp- Xii, I- 
731,, pls. i-xix, 1900-1901. By W. C. Broccer. 
The terminal moraines on both sides of the Christiania fiord were 
considered by De Geer as indicating the lower limit of the last great 
ice sheet, but the results of the investigations by professor Brogger in 
this work show that the land ice extended to the extreme boundary of 
the land mass in southern Norway, and even beyond this limit- 
Many new occurrences of the late and post-glacial deposits are 
recorded, and accompanied by lists and illustrations of the contained 
faunas. On the basis of their molluscan fossils, these deposits are 
classified into a number of divisions, indicating changes in level and 
climate. There was first a period of subsidence of the land after the 
morainic period (ra-time), which is divisible into six stages. This 
was followed by a period of re-elevation divided into seven stages and 
reaching down to the recent period. The climate during the latter 
part of the post-glacial uplift was somewhat warmer than at present, 
Brogger agrees with Ekholm in his time estimate of 9000 years since 
the formation of the kitchen-middens of Denmark, or the beginning of 
the Littorina sea in the Baltic area. 
The succession of faunas and deposits is treated in great detail, and 
the whole work is an admirable example of exact methods of geologi- 
cal and faunal correlation. ep mt 
Catalogue of the Types and Figured Specimens in the Paleontological 
Collection of the Geological Department American Museum of 
Natural History. By R. P. Wutrrtevp and E. O. Hovey. (Bull. 
American Museum of Nat. Hist,, Vol. XI, 500 pp., New York, 1901.) | 
The recently issued part 4 of volume eleven completes the cata- 
logue bearing the title given. The volume forms one of the most 
important aids to the working paleontologist, that has been published 
in a long time. It is a model of its kind. As an example of what can 
be done along this line it is well worthy of emulation by every museum 
making pretensions to being a repository of described material. If 
there is anything which a student of fossils needs above all else, it 
is certainly a record of the disposition of type-specimens. His labors 
are incalculably lightened by such knowledge, in a form for ready 
