' 254 Cc. JUDSON HERRICK 
where they again break up into slender strands which spread 
out forward and Jlateralward. No silver preparations of this 
brain being available, it is impossible to determine the ultimate 
connections of these fibers. They certainly spread throughout 
the ventrolateral nucleus and probably reach considerable 
distances farther forward in the ventrolateral area of the hemi- 
sphere and dorsalward into the dorsolateral area and posterior 
pole. 
—--—-—-— 
= ae 
Sg 
/ 
H. 2168- 2-1-4 
Fig. 832. Three neurons of the nucleus of the dorsal olfactory projection - 
tract of an old larva of Amblystoma tigrinum. Drawn from a horizontal section 
by the method of Golgi. The left side is slightly farther dorsal than the right. 
x 74. These neurons are in connection with the ependymal surface by thick 
smooth processes. This process was probably present in the neuron at the 
left, but is not included in the plane of the section. Many neurons similar to the 
two at the right are seen in our preparations. Their dendrites are widely 
branched and somewhat thorny. The smooth axon arises from the base of the 
dendritic arborization and is directed toward the olfactory projection tract, 
which it probably enters to ascend to the ventrolateral nucleus of the hemi- 
sphere. The dendrites of these neurons ramify in a dense neuropil derived 
chiefly from the medial forebrain bundle and the tractus thalamo-hypothalamicus 
cruciatus, the latter only being impregnated in this preparation. This neuropil 
is greatly simplified in the drawing and is omitted altogether in the regions 
surrounding the axons of the neurons. A single ependyma cell is impregnated. 
