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EXPLANATION (2)

OF

PLATE 41.

diverticulum of nasal tube

orbit —j

zygoma _1

m. temporalis

nasal wing

nasal tube

cartilaginous nasal septum

vomer

pulpa dentis

caudal end of nasal tube

molar (post, end)

diverticulum of nasal tube

m. temporalis

zygoma

nasal bone

cartil. nasal septum
nasal cavity

cartilag. plate appended to nasoturbinal
bony nasal septum

tip of bony nasoturbinal

ethmoturbinal

\^P*L* the deep cleft between proc. molaris and

crista pterygoidea

crista pterygoidea

large air-sinus in posterior part of maxillary
bone, where in younger Elephants
the reserve tooth or the posterior end of
the working molar has its place

cartilage of tuba Eustachii

tuba Eustachii

Fig. 6, Section /'. The cut has partly gone
in front of the nasal tube, which has here a
nearly perpendicular direction, and has hit it
only superiorly and interiorly. The blind end
of the diverticulum from the nasal tube (p. 103)
is also in the section. The posterior part of
the orbit has been grazed. The posterior end
of the molar tooth, wholly surrounded by bone,
is in the section.

m. temporalis

end ot bony protuberance

posterior root of zygoma

glenoid surface

artery

bony lamella surrounding the posterior end of maxillare

ethmoturbinal

air-sinus in maxillary
(comp. lig. 7)

Fig. 7, Section g. The cut has gone through the
large diverticulum of the nasal tube, but has fallen just
in front of the entrance to it, so that the lid in which
the cartilaginous plate is enclosed, appears connected
with the lateral wall (comp. tig. 10).

tuba Eustachii
anterior cornu of hyoid

cerebral cavity

inner end of auricular cart.

bony meatus auditor.

tympanic membrane (fragment)

foramen lacerum post.

basioccipital

Fig. 8, Section h. Fig. 9, the Section following i; in its lateral

part combined with z. § nat. size.

anterior end of zygoma

nervus infraorbitalis lying in the entrance
to the canalis infraorbitalis

entrance from diverticulum to an air-sinus
nasal cavity

cartilaginous plate appended to nasoturbinal

|-cartilaginous nasal septum

entrance to the diverticulum

Fig. 10. Transverse section through the same skull-fragment of which part is figured Plate 39 fig. 3; the
section is laid just before the molar tooth and is somewhat oblique, the upper end being the foremost. Catoptric
image. Seen from before. Somewhat more than half nat. size.