260 H. W. NORRIS 
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Fig. 14 A cross-section through the posterior part of the ear capsule and the 
roots of the IX—X nerves. Section 443. 20. 
Fig. 15 A horizontal section through the attachment of the antorbital carti- 
lage to the skull, showing the relations of the cartilage to the choana. 30. 
superior muscle, the other branch (figs. 8,9, ///.) runs ventrally 
around the ventral border of the optic nerve as the latter emerges 
from the skull and passes along with it until the latter enters 
the eyeball. It supplies the internal and inferior rectus and the 
internal oblique muscles. ‘ 
