Geology and Natural History. 157 
11. The Northern Sahara.—Mr. G. Rotuanp has a paper on 
the Geology and Hydrology of the Northern Sahara (south of 
Algiers and Tunis between Biskra and El Goleah, 350 miles) in 
country as rocky, and states that Cretaceous strata, consisting of 
constitute, in nearly horizontal 
beds, high plateaus, and are overlaid by the Quaternary. The 
Cretaceous formations recognized by the fossils, as near El Goleah 
and Mechgarden, are the Cenomanian and Turonian. The Quater- 
nary deposits are coarse, but regularly stratified, and are of fresh- 
a her : : : 
has shown, for the occurrence of Cardium edule as a common shel 
along with fresh-water species. 
12. Aretie Coal.—The mineral coal of Grinnell Land, near the 
° 43’ N. an 
o 
0°52, ash 6°49, water 2°01=100. e composition is like that of 
much Carboniferous bituminous coal, which it resembles closely 
in luster. Sp. gr.= 1°3. he coal cakes when heated and 
affords 61 per cent of a coherent coke. 
13. The Claiborne Group and its remarkable fossils; by Pro- 
fessor P. H. Mer, Jr., Auburn, Alabama. 10 pp. 8vo, 1880. 
(Trans. Amer. Inst. of Mining Engineers.)—The author of this 
alae can not be a geologist. In a section on page 5, stated to 
h 6“ r fi 29 
. 
Drift 
t ry.—A new p 
4to, bearing the title “ Beitrige zur Palaeontologie von Oester- 
re 
