PLATE 4 
Figs. 14 to 21 are a series of camera tracings of transverse sections of the 10 
mm. embryo extending from the anterior end of the geniculate ganglion to the pos- 
terior end of the placodal portion of this ganglion. The anterior third of the 
ventro-lateral VII is included in the last two figures (20 and 21). Lateralis com- 
ponents are indicated by cross hatching, general visceral by vertical lines, and 
special visceral by stipple. 
Fig. 18 corresponds to the area blocked out in fig. 8 of the preceding plate. 
These figures were sketched from the same series as that from which the first 
reconstruction was made, fig. 1, and numbers of sections indicate position on 
scale of fig. 1. The figures are from consecutive sections. These figures show 
clearly the part the placode plays in the composition of the geniculate ganglion 
after the placode has become detached from the ectoderm. 
Fig. 14 lies at the extreme anterior tip of the geniculate ganglion. See fig. 26 
for detail of fig. 19, and fig. 27 for detail two sections posterior to fig. 21. 
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