Hardesty, Medulla Spinalis of the Elephant. 



135 



axones in the funiculi posteriores and those descending in the 

 ventral funiculi increase in mass toward the encephalon, 



KoPSCH made free-hand traverse sections at different levels 

 and again measured the lateral diameters of the then hardened 

 specimen, and in addition, he measured also the corresponding 

 dorso-ventral diameters. No embedded and stained sections 

 were made and no microscopic examination was undertaken. 

 The measurements included the pia mater spinalis. The breadth 

 of the specimen had been practically unaltered in the process of 

 fixation and hardening. In order to compare the dimensions of 

 the two specimens, the author also measured the two diameters 

 of certain of the segments of the specimen at his disposal. That 

 this comparison may be made and that, at the same time, the di- 

 mensions of the segments and their relations to each other may 

 be more readily seen, the author's measurement and the diame- 

 ters of certain of the segments measured by Kopsch are given 

 in the following tabulated form: 



TABLE I. 



Table I, showing the lateral and dorso-ventral diameters of certain of the 

 segments of two specimens of the medulla spinalis of the adult elephant. The 

 measurements made by Kopsch from a specimen fixed in Mxjller's fluid are 

 placed in parallel columns to those made by the author from a specimen fixed 

 in formalin. The measurements are reduced to round numbers and include the 

 pia mater spinalis. 



Kopsch's measurements show the greatest lateral diameter 

 of the intumescentia cervicalis (and of the entire medulla spin- 



