Freiburger historische Bestände - digital

EXPLANATION

OF

PLATE 45.

Fig. 1. Diagrammatic section through the ethmoidal hone, parallel to and directly before the lamina cri-
brosa, of the skull c.

/—VII first—seventh endoturbinal. /—30 first-thirteeth ectoturbinal. /•' and /" pneumatic sinuses in the
caudal part of the nasoturbinal. Moreover are seen the openings of the pneumatic sinuses of the ethmoidal system
save those of the nasal sinuses in the nasoturbinal and of the sinus 7 b' of the left side. The sinuses, which
are so small that they do not reach the surface of the skull, are represented closed.

Fig. 2. Diagrammatic section through the right half of the ethmoid, parallel to and directly before the
lamina cribrosa, of the Elephant „Chang".

I—VII first—seventh endoturbinal. I—27, 27a, 28, 28a, 29, 30 the ectoturbinals; as to 27a and 28a comp.
the text p. 108. /' and I" pneumatic sinuses in the caudal part of the nasoturbinal. Moreover are seen the openings
of the pneumatic sinuses of the ethmoidal system, save those of the sinuses 25', 26', xx, 29', 29a and 30', the
openings of which have their place at the secondary lamellae, which are not drawn in the diagram. Comp. text-
figure p. 107—cS.

Fig. 3. Diagrammatic section through the left half of the ethmoid, parallel to and directly before the lamina
cribrosa of the skull h.

I—VII first—seventh endoturbinal. I—30 first—thirteeth ectoturbinal. /' and /" pneumatic sinuses in the
caudal part of the nasoturbinal. Moreover are seen the openings of the pneumatic sinuses of the ethmoidal system,
save those of the nasal sinuses in the nasoturbinal. The sinuses, which are so small that they do not reach
the surface of the skull, are represented closed.