124 The Amencan Geologist. August, i&o*. 
enumerating not only those recently found, but those previously col- 
lected by himself and by Grewingk, making 31 "species, 16 more than 
formerly known. 
Certain boulder-clay deposits at Juneau contain Pleistocene fossils, 
marine invertebrates, to a hight of about 200 feet above present 
high tide, indicating that the land then was at least 200 feet lower 
than at present and the climatic conditions somewhat colder. The ge- 
ological features of this vicinity have been discussed by Mr. Gilbert 
in vol. iii of this series. There are 19 species of which two are not 
known in the recent state. 
The fossils of the Yakutat formation are discussed by Mr. Ulrich. 
They are mainly from near Kadiak, on an island off the Alaskan penin- 
sula northeastward from the Shumagin islands, although the name was 
given by Russell in 1891 to a locality near Hidden Glacier nearly 500 
miles to the eastward. These localities are bound together stratigraph- 
ically by the occurrence of a fossil of definite character, Terebellina 
palachei, common to them all, although there are 18 species in all, 13 
being new. Their upper Liassic age is shown by the direct evidence of 
four European species characterizing that age, viz: Chondrites divari- 
catus F. — O., C. alpestris Heer, Helminthopsis magna H. and H. ? 
labyrinthica H., the latter genus being known only as Liassic. The most 
of the fossils are fucoids. 
F. H. Knowlton describes the fossil plants from Kukak bay situated 
a, little north of west from Kadiak island, of which he enumerates 26, 
amongst which the confers and the birches prevail. He describes nine 
new forms, seven are not named specifically being branchlets, seeds, 
scales, etc., leaving ten species previously known. Without hesitation 
they are referred to the upper Eocene. 
The expedition was an excursion, but with the experienced geolo- 
gists who composed the party there could hardly be a failure to gather 
important scientific data. The published volumes bear testimony to the 
industry with which they studied the regions where the temporary camps 
were made, and to the skill and learning with which the data are 
discussed. It is not an exhaustive treatise on the geology of the 
coasts of Alaska, but it is exhaustive and conclusive on the questions 
presented for discussion. Its authority will stand probably unimpaired 
by future observations, and it will have to be consulted by future 
geologists who attempt to add to the geology of Alaska. n. h. w. 
