190 The American Geologist. September, 1897 
used of late by the Swedish, German, and some English observers, 
which have yielded such excellent results with the Rhabdophora. In 
accordance with his view of the life history of individuals of the above 
genus Herr Wiman shows in D. cavernosum the presence of three kinds 
of individuals in the rhabdosome, viz., nourishing individuals, budding 
individuals, and sexual individuals, or gonangia. 
The article has four figures, mostly prepared sections of individuals 
of this species showing the mode of growth and a plate showing por- 
tions of the rhabdosome natural size and enlarged, and sections of the 
cells further magnified. g. f. m. 
Kambrisch-fiilarisclie Faciesbilguuyeu in Jemtland, von Karl Wi- 
man. (Bull. Geol. Instit., Upsala, No. .5, Vol. Ill, 1896.) The aspect 
of the Cambro-Silurian formation (terrane) of Jemtland as shown by 
this account of studies made in that province, differs considerably from 
that of the formation in southern Sweden, notably in the absence of the 
older part of the series. In the conglomerates at the base Eiinjcare 
latum is the oldest type of trilobite found, so there would appear to be 
no recognizable Cambrian portion; even Olenus (sens, strict.) seems 
wanting. This is in accordance with facts observed elsewhere in north- 
ern Sweden where the land was not submerged so early in Cambrian 
time as it was in the south. 
The gray southern limestone is said to conform more closely in aspect 
to the Norwegian type than to that of southern Sweden: and this not 
unnaturally seeing that the western Cambrian areas in Jemtland lie 
along the Norwegian borders and are not more than forty miles from the 
Atlantic. Dark shales prevail in the central part of the {jrovince, but 
quartzites both to the north and south. This Cambrian tract in Jemt- 
land is opposite where at theTrondhjem fjord the Atlantic nearly cuts 
across the Norwegian mountains. 
The paper is illustrated with a number of sections, two plates and a 
map of the Cambro-Silurian of Jemtland. g. f. m. 
RECENT PUBLICATIONS. 
I. Government and State Reports. 
U. S. Geol. Survey Bull., 148, .306 pp., 1897. Analyses of rocks with a 
chapter on analytical methods, laboratory of the U. S. Geological Sur- 
vey, F. W. Clarke and W. P. Hillebrand. 
Indiana Dept. of Geol. and Nat. Resources, 21st (1896) Ann. Rept., 
viii and 719 pp., 39 pis., 6 maps, 1897. The natural resources of Indi- 
ana, W. S. Blatchley; The petroleum industry of Indiana, W.S. Blatch- 
ley; Composition of Indiana coals, W. A. Noyes; Some notes on the 
black slate or Genesee shale of New Albany, Ind., Hans Duden; Indi- 
ana caves and their fauna, W. S. Blatchley: A report on the geology of 
the Middle and Upper Silurian rocks of Clark, Jefferson, Ripley, Jen- 
nings and southern Decatur counties, Ind., A, F. Foerste; Q^he Bedford 
