1881.] Geography and Travels. 835 
GroLocicaL Notes.—Professor E. W. Hilgard summarizes in 
the American Fournal of Science for July the facts for a hypothe- 
sis of a temporary and partial isolation of the Gulf of Mexico from 
the Atlantic ocean during the later portion of the Tertiary period. 
In the same journal Professor R. P. Whitfield refers a group of 
supposed fossil vegetables, named Dictyophyton, to the sponges, 
and in this view he is confirmed by Dr. J. W. Dawson. 
fessor G. H. Stone publishes in the Proceedings of the Boston 
Society of Natural History, an elaborate discussion of the kames 
of Maine and the northern States, and in the same publication 
Dr. M. E. Wadsworth treats of the origin of the iron ores of the 
Marquette district, Lake Superior, endeavoring to prove that they 
are eruptive rather than sedimentary. Two other contributions 
to lithology are comprised in Dr. G. W. Hawe’s paper on normal 
mesozoic diabase upon the Atlantic border, and on the determi- 
nation of feldspar in thin sections of rocks, in the Proceedings of 
the National Museum. 
GEOGRAPHY AND TRAVELS: 
THE IMPERIAL GAZETTEER OF InDIA2.—The six volumes of this 
§azetteer of the province, the whole being under the supervision 
of Dr. Hunter, as Director-General of Statistics to. the Govern- 
Ment of India. Thus, in the space of twelve years an elaborate 
account of the 240 districts into which British India is divided 
was completed, and formed the statistical survey. Such a work, 
intended as it is to furnish full information to administrators, must 
PL Sees by Evtis H. YARNALL, Philadelphia. a 
t on-Genéralof & Gazetteer of India. By W. Ww. Hunter, C. I. E., LL.D., Direc- 
tatistics to the Government of India. London, 1881. 
