Review of Recent Geologicfd Liternture. 211 
gations that are likewise of immediate value for guidance in commercial 
and industrial enterprises, were issued nearly a year in advance of vol- 
ume I, which, however, appeared within about a year after the end of 
the fiscal year to which it relates. 
This first report of the present director fills 130 pages, noting the plans 
for the year, the appropriations, and their allotment to more than thirty 
field parties in geology and paleontology. It gives brief outlines of the 
work done by these parties, and by the divisions of chemistry, hydro- 
graphy, and topography. In the last named department surveys and 
mapping are being extended far in advance of the detailed geologic sur- 
veys. The total appropriation for the Geological Survey, in all these 
departments, during this fiscal year, was $4:97,990. 
Both the strictly geological and the topographical work are widely 
distributed. In geological work thirteen parties were employed in the 
Apjjalachian and Atlantic coastal regions, receiving amounts that varied 
from §600 to §7,500: and in the central and western parts of the country 
fourteen parties, with similar allotments, of which four worked wholly 
or partly in Colorado and four in California. 
The largest amounts for topographical work were allotted to Colorado 
and California, 820,000 each; Texas received §12,000; New York, 
Georgia, South Dakota, Nebraska, and Oregon, each $10,000; while in 
eleven other states topographical surveys were allotted from $2,ti00 to 
85,000 each. 
In pages 133-414, with plates ii-i^xxxv and 66 figures in the text. 
Prof. O. C. Marsh reports on the "Dinosaurs of North America." This 
elaborate paper presents the author's matured classification of this re- 
markable group of Mesozoic reptiles, as now known from this continent. 
The material on which the descriptions are based has been in progress 
of collection more than twenty years, and has led the author across the 
Rocky mountains a still greater number of times. Further discussion 
of the affinities of the class, or its relationship to othei- classes of rep- 
tiles and to birds, will be given in forthcoming monographs. 
•'Glacier bay and its Glaciers,"' by Harry Fieldihg Reid, is th(> 
theme of pages 415-461, with jjlates lxxxvi-xcvi. The maximum ex- 
tent of the Muir glacier, to the Beardslee islands, was followed by a re- 
cession, which is thought to have been comprised within the past 100 
or 150 years, withdrawing the ice front about twenty miles. Between 
1880 and 1890, the continuous annual recession averaged about 750 feet, 
being at the rate of a mile in seven years; but between 1890 and 1892 
an advance of about 900 feet took place, due probably to an unusually 
large snowfall in these years. 
Prof. Lester F. Ward discusses "Some Analogies in the Lower Cre- 
taceous of Europe and America," in pages 463-542, with plates xcvii- 
cvri and figures 67-69. The Potomac formation of the United States is 
compared with the Wealden of England. The geologic relations of 
these two formations, and their paleontology, especially their plant re 
mains, are regarded as evidence of closely equivalent age. The Cre- 
taceous and other Mesozoic formations of Italy and Portugal are also 
concisely reviewed. 
