128 Journal ok Comparative Neurology. 



weight, the area of the substantia alba in transverse section de- 

 creases more regularly and more rapidly than the area of the 

 corresponding substantia grisea. Conversely, as the medulla 

 spinalis increases in size through a series of mammals, the in- 

 crease is more largely due to a more rapid increase of the sub- 

 stantia alba than of the substantia grisea. 



13. The ratio of the area of the section of the cell-body 

 to the area of the substantia grisea containing it decreases with 

 considerable regularity through the series, but since the greater 

 area of substantia grisea contains the greater number of cell- 

 bodies, the variations in the ratios are not similar to the varia- 

 tions in the areas of the cell-bodies. 

 V. Bibliography. 



1. Articles cited. 



2. Other literature on the anatomy of the elephant. 

 VI. Explanation of Illustrations. 



Introduction. 



The material of which the following is a partial description 

 was obtained through the kindness of Dr. Charles L. Bristol 

 of New York University. Learning that the Barnum and 

 Bailey Company had among their animals at Bridgeport, Conn., 

 a "bad elephant" which it had become necessary to kill, Dr. 

 Bristol sought their New York of^ce, was kindly granted the 

 necessary authority and hastened to Bt'idgeport. He arrived 

 on the scene ten hours after the death of the animal. Circum- 

 stances had made it necessary to produce death by strangula- 

 tion. A great force of men had skinned, disembowelled and 

 laid bare the skeleton of the elephant so quickly as to almost 

 entirely obviate the post mortem rise of temperature which 

 otherwise, in an animal of this size, is such as to render the 

 tissues of its internal organs wholly unfit for microscopic pur- 

 poses. Thus when Dr. Bristol arrived about 7 P. M. he 

 could immediately proceed toward the removal of the tissues 

 desired. 



The difificulty of this task may be imagined, especially 

 since it had to be accomplished without injury to the skeleton. 



