1895.] Zoology. 279 
Edinger as merely ganglia for the origin of the peduncular neurites. 
The interlobular commissures are shown not to be compared with the 
anterior commissure of human anatomy where merely two opposite 
lobes are connected. Each of the commissures is composed of neurites 
that branch off from the basal peduncle and branching cross to and 
terminate among the protoplasmic processes, or dendrites, of the opposite 
lobe 
The fascicle of Meynert, which has hitherto been a great puzzle, i is 
explained as being composed of neurites arising from cells in the 
ganglia habenule and terminating near the lower surface of the brain 
in the so-called interpedunculary body. Here they branch profusely, 
KENYON ON BRAIN STRUCTURE. 
Fig. 1. Longitudinal section of a trout brain passing to one side of the median 
line.—l.ant., anterior lobes; l.op., optic lobe ; f. b., basal fascicle; c. p., cerebral 
peduncle ; f. M., fascicle of Meynert arising from the cells in the ganglion habenu- 
læ; op. ch., optic chiasma, behind which is the commissure of Gudden, and in 
front of which are the interlobular commissures. Near the fascicle of Meynert is 
the ansiform commissure 
Fig. 2. The fascicles of Meynert viewed from above, each ending in the inter- 
lobular body. 
Fig. 3. Transverse section through the nucleus of origin of the facial nerve 
VII, neurite of the facial nerve; d. r. v., descending root of the fifth with its 
short collaterals. i 
