Wilder.] 246 



mentioned to him that nowhere on the northern shores of the 

 American Continent and on the Arctic shores of Siberia, were 

 to be fomid any ghiciers, or proper climatic or topographical 

 conditions for the existence of glaciers, as nowhere in these 

 limits did groups of mountains rise from warm valleys high 

 enough to reach the snow line. 



Dr. Jackson also referred to beds of clay sixty feet in 

 thickness on Block Island, on the coast of Rhode Island, 

 which contained perfectly sharp and angular boulders of a 

 peculiar granite, which he had traced to their origin in 

 Kingston, R. I., fifteen miles in a northeast direction. 



Dr. B. S. Wilder exhibited a kitten with extra toes upon 

 both fore and hind feet, which he considered instances of 

 vegetative repetition ; and remarked upon the fallacy of 

 drawing moi^^hological conclusions from parts so variable in 

 quantity, and so subject to teleological modifications as the 

 distal extremities of tlie limbs. 



Prof Wyman stated that when parts are doubled at the 

 ends of limbs, the supernumerary parts did not generally re- 

 peat those of the same, but of the opposite side. There 

 exist many instances of partial doubling of hands and feet, 

 and even of fore arm and arm, the two portions standing in 

 relation to each other as right and left parts. When, how- 

 ever, an additional little finger or toe was developed, these 

 do not conform to this rule and are often quite irregular. 



Drs. J. B. S. Jackson and H. R. Storer in this connection 

 gave instances of abnornal features transmitted by inheritance, 

 and the President added several, showing that in such cases 

 the primitive germ was doubled, that the spinal cord and 

 other parts were spht down and co-ordinated in their devel- 

 opment, which then proceeded as harmoniously as the normal 

 growth of the two halves of the body. 



Mr. F. W. Putnam made a few remarks on an Indian 

 grave which was found in September last, on Winter Island, 

 Salem, by the workmen engaged in making the embankment 

 of Fort Pickering. The grave was situated on a ledge, and 

 made by placing a few stones about two feet from an abrupt 

 ridge of the ledge, and resting other stones from them to the 

 ledge. In this grave were found a stone chisel, ten stone 



