Abbott.] 
124 
[January 19, 
Mr. J. S. Kingsley presented a collection of Crustacea, and 
remarked upon some of the rarer and more curious species. He 
also alluded to the similarity between the crustacean fauna of the 
eastern coasts of Asia and America, which called forth remarks 
from Professor Morse and the President on the same resemblances 
in the case of the molluscs and insects. 
On motion of Professor Hyatt the thanks of the Society were 
voted to Mr. Kingsley for his valuable gift. 
General Meeting. January 19, 1881. 
The President, Mr. S. H. Scudder, in the chair. Fifty-five 
persons present. 
The following papers were read : 
AN HISTORICAL SKETCH OF THE DISCOVERIES OF 
PALAEOLITHIC IMPLEMENTS IN THE VALLEY OF THE 
DELAWARE RIVER. 
BY C. C. ABBOTT, M.D. 
In March, 1872, I published a brief notice — in the American 
Naturalist — of the various patterns of stone implements found 
in New Jersey, and therein described certain rude implements 
that I had found associated with the ordinary forms of flint 
arrowheads and other relics of the Indians ; and I then remarked 
that these rude and elaborate forms, although associated, appeared 
to indicate that the Indian, while an occupant of our Atlantic sea- 
board, had passed “ from a palaeolithic to a neolithic ” condition ; 
and also called attention to the marked similarity between these 
surface-found rude implements, and the palaeolithic implements 
found in the river valleys of England and France. 
This similarity was also remarked by the late Professor Wyman, 
to whom I had forwarded specimens. He says, in the Fifth Annual 
