GANGLION CELLS OF NERVUS TERMINALIS 439 



These may occur at any point along the nerve from the place 

 where it leaves the brain to its entrance into the nasal sac. 



In figure 1 appears a drawing which shows the general relations 

 of the cells in the main ganglion of the ner\ais terminalis. The 

 other figures illustrate single cells. A glance at the figures will ' 

 indicate that multipolar cells are quite predominant. In a 

 study of the thirty nerves only a few cells have been encountered 

 which might be bipolar in structure and in these the bipolar 

 condition can not be established with certainty. That the 

 selective action of the methylene blue has picked out only the 

 multipolar cells and has left unstained the bipolar cells is not 

 impossible but not at all probable. 



CONCLUSION 



In the smooth dogfish (Mustelus canis) the ganglia of the 

 nervus terminalis, when stained with methylene blue (intra- 

 vitam), are seen to contain multipolar nerve cells. Few, if any, 

 bipolar cells have been demonstrated. 



Anatomical Laboratory, Western University 

 London, Ontario 



LITERATURE CITED 



LocY, W. A. 1905 On a newly recognized nerve connected with the forebrain of 



selachians. Anat. Anz., Bd. 26. 

 McKiBBEN, Paul S. 1913 The eye-muscle nerves in Necturus. Jour. Comp. 



Neur., vol. 23. 

 Wilson, J. Gordon. 1910 Intra-vitam staining with methylene blue. Anat. 

 Rec, vol. 4. 



