304 REVIEWS. 
more nearly related than naturalists haye supposed. We trust 
paleontologists will be on the lookout for these fossils in our Coal 
Measures. 
Ace OF THE Mississiprr Detta.*—In his ‘‘ Principles of Geol- 
ogy,” Sir Charles Lyell objected to Gen. Humphrey’s view in his 
“ Report on the Mississippi River, p. 99,” “that this river is flow- 
ing through it [the delta region] in a channel belonging to a geo- 
logical epoch antecedent to the present,” stating that the bed of 
the river might belong to the delta formation. Prof. Hilgard, how- 
ever, from a reexamination of the borings made at the artesian 
well in New Orleans, states that the strata are of marine origin, 
containing numerous shells of probably quaternary age, so that 
at that time the mouth of the present river was an estuary. “A 
river doubtless emptied into the great estuary during the Cham- 
plain period of slow depression, but it was not the Mississippi 
river of to-day, which excavated its bed, partially into these very 
strata, and acquired its identity during the terrace epoch of eleva- 
tion.” The absence of drift wood, or its debris, ‘which meets the 
eye in every microscopic examination of the Mississippi delta de- 
posits,” is a “capital objection to the delta-deposit character of 
these strata.” 
PEABODY MUSEUM or American ArcH&OLOGY AND ETHNOLOGY. 
—Few people are aware of the value and interest of the collec- 
tions brought together is this unique museum. Besides the col- 
lections already purchased in Europe and previously noticed in 
this journal, the well known Clement collection of remains from 
the Swiss Lake dwellings has been lately added. 
“It contains, in all, eight hundred and sixty-five specimens. 
Of these, six hundred and eighty-seven, assigned to the age of 
stone, are chiefly from localities near Concise and St. Aubin, and 
were mostly collected by Dr. Clement himself. Of the remains of 
animals, wild or domesticated, there are those of the ox, hog, 
sheep, goat, dog, deer, cat, fox, lynx, bear, weasel and squirrel. 
Among the implements of stone are spear and arrow points, borers, 
chisels, axes and other kinds of cutting instruments. Many of the 
stone tools are still retained in their sockets made of the antler of 
*Report on the Geological Age of the Soe Delta. By Prof. E. W. Hilgard to 
Gen. A. A. Humphreys. Washington, 1870. 8vo 
+ Third Annual Report of the Prustess of the e Peabody Museum of American Archæ- 
ology and Ethnology. Boston, 1870. 8vo 
