1879. ] Recent Literature. 115 
remote time, submerged, but has become narrowed down through 
the same agency from different directions. Being guided by the 
manner in which the implements were found, and other meagre 
evidence, one would suppose them to date back to the lacustrine 
period, but in this we find difficulties which can be explained in 
answer to the third point. 
The difference in elevation between this locality and that on the 
banks of the Schuylkill river (as well as that on the Eastern 
Branch) is too great for them to have been occupied simulta- 
neously, unless we throw out the suggestion of a lacustrine 
period. Acting upon this, the matter becomes more comprehen- 
sible, from which may be deduced the following propositions, viz : 
Ist. That the three localities were occupied by a similar people, 
at or nearly at the same time. 
2d. That these people lived chiefly upon fish, as is inferred from 
the implements which, under ordinary circumstances, would be 
worthless in the chase. 
3d. That these typical forms of rude workmanship, indicate 
greater antiquity than we find represented in the rudest forms of 
Indians who subsequently occupied the same localities. And— 
4th. That the position of some of the implements in the strati- 
fied drift, and their relation in this respect to the location of 
modern relics, indicates an indefinite lapse of time from the dis- 
-appearance of this primitive race to the appearance of the Indians 
proper, whose rudest forms of workmanship are found near or 
upon the surface. 
ʻO: 
RECENT LITERATURE. 
-  BRenmMs’s ANIMAL Lire.\—The volumes that have been pre- 
viously noticed of the series, have related to the vertebrate animals, 
which are naturally in.a work a a thorougly popular character such 
as this, treated ofat much grea e 
present volume has been an by Prof. Oscar Schmidt, of the 
University of Strasburg, who is distinguished for his knowledge 
of the structure and mode of development of the lower animals. 
This volume begins with the Crustacea, and descends through 
1 Brehm’s Thierleben. Allegemeine ee des Thierreichs, Grosse Ausgabe. 
Zweite umgearbeitete und vermehrte Auflage, Vierte Abbeitongs Wirbellose ee 
Zweite Band. Die Niederen Thiere. Vou Dr. Oscar ScHMipT, Krebse, Wiirm 
Weichthiere, Stachelhauter, polypenartige Thiere, Urthiere. Mit 366 ‘Abbiidanges: 
im Text und 16 ge on JOHANNA SCHMIDT, EMIL SCHMIDT und seer 
KRETSCHMER. Leipzig, Vei des Bibliographischen 7 See ye ¥ Parts. 
40 cents a part, for sale by B. Westermann s Co., New 3 : 
