382 TJie American. Geologist, December, i899 
ice-sheet at the same time; 4. Wash-cones, steeply sloping deposits, 
with ice-contact slope on the iceward side culminating in a high point, 
with gentler slope outward, in the manner of alluvial cones. 
The broad glacial wash-plains of gravel and sand descending from 
the terminal moraines of Martha's Vineyard, Nantucket, and Cape 
Cod, are the most extensive found in Massachusetts. About halfway 
between the base of Cape Cod and Boston, Mr. Woodworth maps a 
series of morainal tracts and comparatively small wash-plains, extend- 
ing from the vicinity of Providence,KR. I., northeastward to Bridge- 
water and Scituate, Mass., which doubtless marks a line of boundary 
of the ice-sheet at a stage of its general retreat. Another series of 
similar character, lying about fifteen miles farther northeast, extends 
from Woonsocket, R. I., to Canton, Mass. 
Mr. Woodworth shows that the marginal part of the ice-sheet dur- 
ing its recession from southern New England, at least .as far north as 
to the Cape Ann boulder moraine, had sufficient thickness and slope to- 
be in motion quite to its boundary. Masses of the ice-sheet, however, 
were left in many places by its retreating border, and became partly 
or wholly inclosed by plains of stratified drift, their places being now 
occupied by lakes. w. u. 
The Mechanical Composition of IVind Deposits. By Johan Au- 
gust Udden. Augustana Library Publications, No. i; 69 pages, with 
38 tabular figures. Rock Island, 111., 1898. 
In this memoir Prof. Udden describes the wind erosion and trans- 
portation of fine lag gravel, drifting sand, finer lee sand, and atmos- 
pheric dust, as observed at many localities from Florida, Maryland, and 
Massachusetts, west to Arizona, Colorado, and Washington. It is be- 
lieved that this investigation will help to answer the question of the 
origin and mode of deposition of the loess. The author, however, con- 
cludes that the geologic action of the wind is yet too imperfectly known 
to permit a final verdict concerning its share in the origin of this for- 
mation, w. u. 
The Upper Canibriaii Faunas of Aft. Stephen, British Columbia ; 
The Trilobites and Worms. By G. F. Matthew. (Trans. Roy. Soc. 
Can., Ser. 2, vol. 5, sec. 4, p. 39.) 
This is a critical review of the genera and species of this interesting 
fauna, first made known by Dr. Carl Roeminger. The fine preserva- 
tion of these fossils makes them available for comparison to an un- 
usual degree. 
Only the trilobites and worms are described in this paper. Among 
the latter are included the Hyolithidae heretofore classed as pteropods. 
The author in a companion article (The Etcheminian Fauna of Smith 
Sound, New Foundland) gives his reasons for offering the Annelida 
as a suitable place for classifying the Hyolithidse and related forms: 
chiefly on account of the slender cylindrical terete tube from which 
they spring. 
The new genus Urotheca is proposed for chitinous or horny fiexu- 
