148 



ANATOMY OF THE CENTRAL NEEVOUS SYSTEM. 



the olfactory nerve, which, however, terminated at the inconspicuous olfac- 

 tory lobe, and the part of the olfactory apparatus which passes from the 

 lobe to the brain — to the Lobus olfactorius posterior — must be designated 

 the olfactory tract. 



Fig. 95. — Brain of tlie barbel: Barbus lliirialUis. (Sagittal section 

 near the median line.) 



In the brain of the barbel (Fig. i'o) one sees the long course of the tract, 

 also the entrance of the fila into the bulbus, which lies far anterior to the 

 rest of the l)rain. In the perch, however, the bulbus is so close to the brain 

 that the olfactory tract {Bad. olf.) is very short. 



Fig. 96. — Brain of Perca flnviatilLi. Olfautory apparatus and corpus slriatii 

 only shown. (Sagittal section somewhat lateral.) 



The posterior end of the secondary olfactory fibers^ was long unknown 

 until C. L. Herrick was able to show that one part ends in the basal portion 

 of the Lobus olfactorius posterior, and another part farther dorsal in a part 

 of the brain which lies upon the corpus striatum. The author has carefully 



