58 



OLOF LARSELL 



a number of delicate strands in this part of its course. Many of 

 these strands were traced caudally to neighboring blood-vessels. 

 The shrunken condition in which these vessels were found, how- 

 ever, did not favor an attempt to find twigs, such as were ob- 

 served in the beef, which pass into their muscular walls. At the 

 region where the olfactory stalk swells to form the bulbus olfac- 

 torius, the main trunk of the terminalis divides into five rela- 

 tively large strands and a number of smaller ones. A few milh- 

 meters caudally of this point a single strand is given off, which 

 appears to pass laterally and beneath the olfactory stalk. The 

 five larger strands continue rostrally, anastomosing with the finer 

 strands and with one another, and thus form a plexus very similar 



^ii^w 



4^ 



Figs. 44-47 Ganglion cells from ganglion terminale of full-term mule fetus. 

 Formalin fixation, thionin stain. X 550. 



to that observed in the cat (figs. 1 and 3) and in the dog (fig. 

 49). 



About 3 mm. rostrad to the point where these strands assume 

 a separate course, and lying in the path of the largest of the 

 five, is a large flattened ganglion (fig. 48. gn.) of irregular outline. 

 This ganghon receives fibers also from other strands of the 

 plexus than the one in whose apparent course it is placed, so 

 that it lies in the midst of the plexus. 



A much smaller ganglion (gn',) is present caudally, on the main 

 trunk midway between the larger ganglion and the point of 

 union of the central roots. 



Rostrally of the main ganglion, two of the larger strands enter 

 the sheath of connective tissue which encloses the vomeronasal 



