Review of Recent Geological Literature. 377 
coal regions of the AUeghenies. A return was made to Bal- 
timore on the 10th of May. 
After a short stay in Washington, professor Brogger vis- 
ited the University of Chicago, where on the nth and 12th 
of May, he gave two lectures. He returned east by way of 
Niagara falls and after brief visits in New York, New Haven, 
and Boston, to which cities he was attracted by the muse- 
ums and universities, he sailed early in June for Norway. 
The geologists in America are under special obligations 
to Mrs. George Huntington Williams for enabling them to 
meet and to listen to such eminent scientists as Sir Archi- 
bald Geikie and professor W. C. Brogger. 
It is especially fitting that the latter should deliver a 
course in this lectureship for his chief investigations have 
been along the same lines as those of professor Williams and 
for him and his work professor Williams often expressed 
unbounded appreciation and respect. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
Stratigraphie du Massif Ca7iibrien de Stavelot. par M. Lohest 
et H. FORIR. (Annales de la Societe geologique de Belgique, Tome 
XXV bis, 4to, 50 pages, several cuts and two plates, Liege, iSgg-igoo.) 
The Cambrian rocks in Belgium have not been determined by an 
abundant and varied series of organic remains, but M.M. Lohest and 
Forir have brought together in their memoir (and analyzed) the 
kiiov/ledge relating to them that has been accumulated in the last fifty 
years. 
From this memoir we learn that Mr. Andre Dumont made the first 
important study of these rocks, and the classification adopted, based 
on his work and that of later investigators is the following (descend- 
ing order): 
Salmien System. 2. Quartziferous fine shales dominant. i. 
Fine black shales dominant. 
Revinien System. Fine shales and black pyritiferous quartzites. 
Devillien System. 2. Fine shales and greenish white quartzite. 
I. White quartzites of Hourt. 
In 1S66 Mr. C. Malaise announced the discovery of Dictyoncma 
and of Chondrites antiquus Goepp in the rocks of Spa. A few years 
