Geology and Paleontology. 1013 
The atlas of Morocco, by M. de Foucauld, is a most valuable 
addition to the geography of the north of Africa. The lines of 
mountains and rivers shown on previous maps are here considerably 
modified. The Atlas range in Morocco is composed of three 
parallel chains instead of one, and the course of the Dra is found to 
be in its upper part half a degree to the west of its previously 
supposed position. 
Captain Pleigmeur, who was commissioned to study the levels 
across the French African territory, between the Atlantic Ocean 
and Stanley Pool, was drowned in the River Niari. 
The Northwestern African Trading Company, which succeeded 
to the rights of Mr. Mackenzie at Cape Juby, near the frontier of 
Morocco and opposite to the Canary Islands, imposes a duty o 
from ten to twenty per cent. upon merchandise going into Morocco. 
The factory of this company was recently attacked by the natives, 
and the director, M. Morris, was assassinated. 
In May, 1888, news was received from Cairo respecting Lupton, 
Slatin, and the other prisoners of the Mahdi. Their situation is 
the most miserable possible, they are condemned to the hardest and 
most humiliating tasks. To negotiate for their release wou 
trouble lost, to organize an expedition would be to hasten their 
death. None the less it is a shame to leave Europeans in this 
deplorable condition. 
GEOLOGY AND PALZONTOLOGY. 
DESCRIPTION or New Species oF FOSSILS FROM THE ROCK- 
FORD SHALES oF Iowa.—Professor Newberry, in speaking of the 
mingling of the Devonian fauna of Ohio, says: “ The mingling of 
the fauna of the Hamilton and Corniferous is apparently somewhat 
greater here than in New York, but this is readily explained by the 
fact that here, as in other portions of the Western States (Lowa 
included), there were no such striking alternations of conditions 
outs the successive deposition of strata as are indicated at the 
“An open sea prevailed throughout several successive periods at 
the west, and during these an unbroken series of limestone strata 
was formed, while at the east alternating shore and off-shore con- 
ditions interposed sheets of mechanical sediment, and gave more 
distinctness to the fauna of each formation.” 
1 Geology of Ohio, Vol. I., p. 144. 
