108 F. W. STP^WART 



SUMMARY 



Realizing that the gangUon cells of the nervus terminalis are 

 largely of the multipolar variety, suggestive of ganglion cells of 

 the sympathetic type, attempts have been made of late to asso- 

 ciate them developmentally with sources known or believed to 

 give rise to certain sympathetic ganglionic masses of the head. 

 These sources are briefly, 1) the trigeminus nerve and, 2) the 

 sympathetic of the cervical region. The author has studied the 

 proliferations from the olfactory epithelium which he believes 

 give rise to the ganglion cells of the nervus terminalis, and has 

 searched for evidence of contributions from other sources at 

 different periods of embryonic life. Results have been entirely 

 negative in character, no such additional sources having been 

 encountered. 



Department of Zoology, 



Cornell University, Ithaca, N. Y. 



