Reviezv of Recent Geological Literature. 383 
known, enabling the marginal moraines to be traced and correlated 
across more than half of our continent. w. u. 
Eine Untersilnrische Litoralfacies bet Locknesjon in Jemtland, 
von Carl Weiman. [Bull. Geol. Inst. Upsala, No. 8, vol. iv, pt. 2, 1899 
(1900).] 
In this article is described some interesting shore-line phenomena 
of the old Ordovician sea in a district of northern Sweden. 
The author appears to imply that the shore-line phase of the Ordo- 
vician which he ascribes to the age of the Orthoceras limestone (extend- 
ing up to the Chasmops limestone) contains many brecciated fragments 
of the underlying rock, although there are true conglomerates in the up- 
per layers. The author does not suggest any cause for this peculiar phe- 
nomenon of profuse supply of angular fragments of all sizes. Where 
it rests upon the fundamental gneiss, the shore deposit is a compact 
mass of brecciated stones — of granite quartz, diabase, alumslate, 
etc. It would appear that the Cambrian alumslates were consolidated 
before the mass of breccia was formed. Several variations of this de- 
posit are described, the upper being of a sedimentary nature and pass- 
ing to the true conglomerates above referred to. 
This brecciated deposit is locally known as "Loftarsten". By the 
sections and description the "Loftarsten" is seen to range from the base 
of the Orthoceras limestone to the Chasmops limestone. 
A number of sections show the disturbances the region has under- 
gone since Ordovician times and there is a geological map which shows 
the distribution of the "Loftarsten" and the related terranes. g. f. m. 
Ueber Euloma iind Parostonia, von J. F. Pompeckj in Miinchen. 
(Neues Jahrbuch fiir Mineralogie, Geologie und Palteontologie, Jahr., 
1900, Bd. I, s. 135-138.) 
This is a controversial article in which the author contends that the 
genus Euloma is characterized by three pairs of glabellar furrows as 
against Prof. Freeh who has stated there are two. Also that Pharasto- 
ma has but two pairs of glabellar furrows. The author also differs from 
Freeh in claiming that in the latter genus, the facial suture turns inward 
in going toward the front margin, in opposition to Freeh who contends 
for an outward direction of this part of the suture. There are si.\ fig- 
ures of the head of a species of this genus and of an Euloma to show 
the suture and furrows in these genera. g. f. m. 
Maryland Geological Survey, Vol. Ill, iSqq. By William Bul- 
lock Clark, State Geologist, The Johns Hopkins Press, Balti- 
more, Md. 
The third volume of the Maryland Geological Survey is illustrative 
of the advance of investigation in directions of practical as well as of 
theoretical interest. It treats of the highways of Maryland, and con- 
tains much instructive information. The subject is of economic im- 
portance and the aim of the report is to supply to the citizen of the 
state information which cannot fail to affect the construction of roads 
in the future. 
