'J( K ) 



IK.KI) W. STKWAKT 



may be IoiiikI arranged in ;i definite row m,s in figure 36. Rhine- 

 hart ('18) has called attention to the presence of ganglion cells 

 along fibers of the hypoglossal nerve in the tongue. Save where 

 fibers of the chorda Lingualis hunk are associated with those of 

 the hypoglossal, n<> such cells have been encountered in the ratj 

 the main hypoglossal trunk has never been found to contain 

 ganglion cells. Roughly speaking, the ganglia of the anterior 

 two-thirds of the tongue I >< 1< > 1 1 ^ with the chorda lingualis migra- 

 tion, those of the posterior third belong with the lingual division 

 of the glossopharyngeus. ( !ould it be shown that ganglion cells 

 enter the tongue by way of the hypoglossus, it might be most, 

 Interesting in connection with the transient hypoglossal ganglia 

 described by Prentiss CIO) and others. 



Trigeminal portion of the sympathetic 



Thus, the possibility of a contribution of trigeminal elements 

 to the submaxillary ganglion cannot be denied, nor have l been 

 able to verify its occurrence. Likewise, I have little to add to 

 the controversy regarding the morphology of the ciliary ganglion. 

 The reader is referred to papers dealing more especially with (lie 

 ciliary ganglion or with general aspects ol cranial nerve mor- 

 phology for more complete discussion, particularly v. Kupffer 

 ('95), Hoffmann ('96, '97, '99), Johnston '(05), Carpenter ('06), 

 Belogolowy ('10), and the recent paper of Neal f'll). Kuntz 

 ('13) has studied the development of the ciliary ganglion in the 

 pi^, and believes it to arise from cells migrating peripheralward 

 from tli«' neural tube along the oculomotor nerve, and from others 

 migrating from the semilunar ganglionic mass along the ophthal- 

 mic division of the trigeminus. Streeter ('12) assigns the 

 ciliary ganglion in human embryos to cells which apparently arise 

 from the semilunar ganglion. In this respect my own observa- 

 tions on the development of the ciliary ganglion in the rat accord. 

 The facti to be emphasized are the following: first, the anlage of 

 the ciliary ganglion is to be found in :i direct .'interior extension 

 over the o|)iic stalk of cells continuous with, and apparently 

 similar to t hose found in the semilunar ganglion din- 17) ; secondly, 



