NERVUS FACIALIS OF ALBINO MOUSE 115 



Gushing ('04) has presented very convincing clinical eviderce 

 that the chorda tynipani supplies the tongue with certain forms 

 of common sensation. After trigeminal neurectomy he found 

 that sensations of pain and temperature and tactile sensations 

 are absent in the area supplied by the lingual nerve. There re- 

 mained, however, the ability of the patient to appreciate the 

 presence, the general location, and the movement of a piece of 

 cloth or a cotton swab across this area. 



The nerve supply of the submaxillary and sublingual glands in 

 the mouse corresponds closely to that given by Langley ('90) and 

 Huber ('01) for the dog and cat. In the mouse the sublingual 

 or the retrolingual gland is located lateral and ventral to the sub- 

 maxillary and is pure mucous in type while the submaxillary is 

 pure serous. 



The nerves to these glands leave the lingual as a number of 

 branches (five to eight) arising deep to the mylohyoid muscle 

 ard rather widely separated. These nerves come into relation 

 with the ducts and pass with them into the glands. Along these 

 rerves there are several small ganglia. In the series most care- 

 fully studied there were five of these, two sending their fibers 

 along the submaxillary duct, one along the sublingual duct, while 

 the other two send fibers along the ducts into both glands. 

 Within the submaxillary gland there are two large ganglia and 

 several smaller ones. The ganglion cells in these ganglia are so 

 numerous that if each is supplied with a basket-work from the 

 chorda tympani as described by Huber, each chorda fiber must 

 divide and terminate in relation to several cells. A fiber divid- 

 ii g and ending in relation with two cells was seen by Huber. 



In the mouse the fibers from the sympathetic to these glands 

 are much more numerous than those from the chorda tympani. 

 An estimate, based on the cross-section area of the nerves from 

 the two sources, shows the fibers from the sympathetic to be at 

 least ten times as numerous as those from the chorda. 



Most of the sympathetic fibers ^nter the glands along the ar- 

 teries. One relatively large and constant bundle, however, en- 

 ters the dorsal border of the submaxillary gland anterior to the 

 hilus and joins one of the main subdivisiors of the duct. There 



