168 [December, 1844. 



mens of natural history above announced as received in 

 exchange. 



Dr. Morton read a communication from Dr. Alfred T. 

 King, of Greensburg, Pennsylvania, and intended for publi- 

 cation, in relation to the fossil foot marks found in his vicinity, 

 casts of which were presented by him at a late meeting of 

 the Academy. Referred to the following committee: Dr. 

 Morton, Mr. Phillips, and Mr. Cassin. 



Dr. Morton submitted the following observations on the 

 measurements of the internal capacity of the crania deposited 

 by him this evening. 



In the Society's Proceedings for December, 1841, I com- 

 municated the result of the internal measurement of forty-five 

 skulls of native Africans, of the Bassa, Grabbo, Makoua, 

 Benguela, Mina, Mozambique and other but undetermined 

 tribes. Those measurements gave 85 cubic inches for the 

 internal capacity of the cranium, or size of the brain. More 

 recently I have received, through the kindness of Dr. Goheen, 

 twelve additional skulls of native Africans, of which ten are 

 adult, and afford the following measurements: 



The largest heads in the series are those of two Kroomen, 

 which afford respectively a capacity of 92 and 95 cubic 

 inches. The smallest head, that of a female, (tribe unknown,) 

 measured but 65 cubic inches, which is the smallest adult 

 cranium I have hitherto met with; while the mean of all 

 gives a fraction more than S4 cubic inches. Of this series of 

 heads, nine are male, and one is female ; and they are de- 

 rived from the Kroo, Golah, Pessah, Dey, and Eboe tribes. 



In addition to these, I possess a single female Hottentot 

 skull, which measures 68 cubic inches ; and if we take the 

 mean of the whole adult series of fifty-six crania, we find it 

 to be about 85 cubic inches, which may be assumed as the 

 average bulk of the brain in the Negro race ; thus confirm- 

 ing, in a very satisfactory manner, the results of my previous 

 observations. 



