Hardesty, Medulla Spinalis of tlic Elephant. 



169 



either of the three regions. The species of his monkey and 

 rabbit are not given. His results may be arranged as follows : 



BiJHLER ('98) also made some measurements from the 

 ganglia spinalia of a series of vertebrates. His series involved 

 man, dog, cat, rabbit, pigeon, frog, lizard, and white fish. He 

 did not arrange his results according to the segments from which 

 they were obtained. However, as to general size his results 

 pertaining to mammals agree with those of Cavazzani, 



Upon the measurements of Cavazzani and Buhler the fol- 

 lowing statements may be made with reference to the ganglia 

 spinalia : 



1. That the size of the cell-bodies of the ganglia spinalia 

 varies in the different regions of the medulla spinalis of the 

 same mammal. 



2. That the size of the cell-bodies of the ganglia spinalia 

 varies in the same regions of the medulla spinalis of different 

 mammals. 



3. That these variations in the size of the cell-bodies are 

 not directly proportional to the variations in the size of the body 

 of the animal, though in general the larger mammal possesses 

 the larger cell-bodies in its ganglia spinalia. 



