488 _ Scientific Intelligence. 
species; and the Newropterids and Sphenopterids show Permian 
features. Further, the occurrence of Conifers of the genus Sapor- 
which made its appearance in the Permian, has great prominence 
in the Jurassic. 
The evidence from the animal fossils is feeble, as there is little _ 
of it, but none opposes the idea of a Permian age. 
ove the hr ite a vont its associate coals, the Redstone 
and Bowiskley ther two marked stratigraphical horizons. 
One is that of the eg dctaies bkween the Sewickley and Waynes- 
burg coal-beds ; in the shales accompanying the latter there occur 
nearly all the characteristic Car sda ee plants of the Upper 
Barrens, but mixed with many new forms. The other is that of 
the overlying Waynesburg ieoait nis much of it very pebbly. 
investigatio ns of Weiss, Grand bas and others.” The first of 
the above horizons marks the transitions from the Carboniferous 
to the Permian. 
e conclusion of the authors appears to be well sustained ; 
and, as they state, it places the “ great Appalachian Revolution” 
“ at the close of the Permian Period” and explains “ the absence 
of Permian beds from the Mesozoic areas of the eastern portion 
i neg Continent and the Triassic age of the oldest beds there 
oun 
2. Geology of Wisconsin: Survey of 1873 to 1879. Vol. IU, 
daohacanren by an Atlas of Maps. “Published under the direction 
of the Chief Geologist, J. C. Cuamperiin, by the Commissioners 
of Public vrmeng. 764 pp., 8vo, with many plates, maps 4 
sections. 1880.— This volume of the final report on the Geol- 
ogy of Wisc sconsin treats of the generat Eon of the Lake 
on the general geology, and geology of the Eastern Lake 
rior district; R. Pumprtry, on the lithology of the Keweenaw 
stem ; ~ A. JULIEN, on some rocks of Ashland County; ©. #. 
the Huronian series of Penokee Gap, eee 
SWEET, on the Western Lake Superior district; T. C. 
LIN, on the Upper St. Croix district, from the notes of the late 
OSES ene T. B. Brooks, on the enominee regi 10N ; 
Wichmann, on the sient character of the Huronian rocks 
of the Iron. Salen The volume contains many maps, sections 
