Reviezo of Recent Geological Literature. 385 
and islands from Cape Wolstenholme south to Great Whale river, 
finding on the Nastapoka islands very rich deposits of magnetite and 
haematite. After wintering there, he was to continue his exploration 
during the present summer. \v. u. 
Wells of Northern Indiana. Dy Frank Leverett. Water Sup- 
ply and Irrigation Papers of the U. S. Geological Survey, Xo. 21. 82 
Images, with two maps. Washington, 1899. 
During the author's exploration of the glacial drift and its morainal 
ridges in Indiana, many notes of wells have been obtained for com- 
parative studies of the drift formations, their thicknesses, and the depths 
to the bed rock. Those notes, with maps showing the contour of 
the state, the average depth of the drift, courses of the ten or more 
concentrically looped moraines, the loess, valley drift, and areas of 
extinct lakes, are published in this paper, which will be found very 
useful to the people in many practical ways. 
Another paper, of similar scope, by the same author, noting records 
of wells in southern Indiana, is published as No. 26, of 64 pages, in 
the same series. w. u. 
The Fossil Bison of North America. By Frederic A. LuCAS. 
Proceedings of the U. S. National Museum, No. 1172, in Vol. xxi, pages 
755-771, with plates Ixv-lxxxiv. W^Tshington, i8qq. 
Seven species of bison are recognized by fossil remains on this conti- 
nent, all being probably restricted to the Pleistocene period. The one 
most abundantly represented, as at the Big Bone Lick. Kentucky, is the 
single now existing species, which has been nearly exterminated, though 
formerly it had herds of almost countless numbers. \v. u. 
Remarks on the Heliolithidce. By G. Lindstrom. (Kongl. Svenska 
Vetenskaps-Acad. Handl, Band, 32, No. i. Stockholm, iSgg.) 
In this memoir it is chiefly the Swedish species of Heliolithid;c 
which are reviewed; the Coccoseridse are appended as a closely allied 
group. 
No true knowledge of these corals can be had without transverse 
and longitudinal sections; as species which outwardly are alike have a 
■quite dissimilar interior structure. Dr. Lindstrom depends chiefly 
upon the internal skeletal characters to distinguish the species and 
genera, such as the size and shape of the septa, the structure of the 
coenenchyma. and the dissepiments as seen in longitudinal and trans- 
verse sections. 
A verj- full account is given of the coenenchyma which in some 
species is tubular, in others vesicular. Other forms have the coenen- 
chyma bacular, or compact. The calicle of a Heliolithes precedes 
the appearance of the coenenchyma. The septa are constantly twelve. 
Heliolithes were propagated from free swimming larvae, and also by 
gemmation, which was the more frequent method. Dr. Lindstrom 
excludes from this family many genera which by other authors have 
been included; Calapoecia, Halysites, Heliopora among others. He 
<t11ows as genera of Heliolitida\ Hcliolites. Plasmopora. Propora, 
