Review of Recent Geological Literature. 123 
section at Burlington than had been generally supposed to be the 
case. However, the recent discoveries in the shales beneath the 
Chonopectus sandstone, of faunal elements very much older than 
has been found anywhere else in the section find additional ex- 
planation. 
Altogether, professor Weller’s paper is a most welcome contribu- 
tion to Kinderhook literature. Ce. 7X. 
Ueber die Borkholmer Schicht in Mittelbaltischem Silurgibict. von 
Cart WimMan. (Bull. Geol. Instit. Upsala No. 10. Vol. V, Part 2, 
1900. ) 
This memoir gives a full account of the fossils found in the island 
of Gotland and elsewhere in the above named bed of the Leptena 
limestone of the Upper Silurian. Fragments of this bed in the con- 
dition of erratic blocks are scattered in drift over the island of Got- 
land and contain more or less of silicious nodules. These are sup- 
posed to have been lumps of colloid silica that formed at the bottom 
of the Silurian sea of that time, as the flint of the Cretaceous chalk 
did at a later period in western Europe. 
By the careful method of manipulation adopted by Wiman an ex- 
tensive and varied fauna was obtained, consisting of trilobites, mol- 
. luses, brachiopods, Bryozoa, corals, graptolites, sponges, etc. 
A table is given, showing the occurrence of the several species in 
the various blocks from the bed, that were studied. Also a list of 
the known fauna of the Leptzna limestone. 
About a dozen new species are described in this memoir, and 
three new. genera of graptolites—Reticulograptus, Galeograptus and 
Diseograptus. The memoir is illustrated with four plates of figures 
and several wood cuts. co Atie Sie 9 
MONTHLY AUTHOR'S CATALOGUE 
OF AMERICAN GEOLOGICAL LITERATURE 
ARRANGED ALPHABETICALLY, 
ECKEL, E. C. 
The formation as the basis for geologic mapping. (Jour. Geol., 
vol. 9, pp. 708-717, Nov.-Dec., 1901.) 
ELLS, R. W. 
The Carboniferous basin of New Brunswick. (Trans. Roy. Soc. 
Can., 2nd ser., vol. 7, sec. 4, pp. 45-56, read May 23, 1901.) 
GORDON, C. H. 
On the origin and classificaion of gneisses. (Proc. Nebr. Acad. 
Sci., vol. 7, pp. 60-96, Nov., 1cor.) 
HALLOCK, WILLIAM 
_ Peculiar effects due to a lightning discharge on Lake Champlain 
in August, 1900. (Jour. Geol., vol. 9, pp. 671-673, Nov.-Dec., 1901.) 
