Freiburger historische Bestände - digital

To face pag. 107—8.

Textfigure. The Elephant Chang. The figure shows the issuing lines of the basal lamellae from the lamina
cribosa (/—/) and from the lamina lateralis, together with the openings into the pneumatic sinuses. In the
elaboration of this figure we have used partly PL 38 fig. 3, partly the object itself. The basal lamellae are
chiselled down towards the lamina lateralis still deeper than in PL 38 fig. 3, for which reason more openings
have become visible. At the sinuses 7', 7'a, IF and IH'a the apertures are situated so closely to and beneath
the issuing margin of the basal lamellae and in such a position, that they can only be seen through inspection
from the caudad side; nevertheless they have been drawn on the figure, at a little distance from the basal
lamellae, in order to indicate the place where they are to be looked for. The openings into the sinuses F, I",
3', 4', 4'a, 5' and to the sinus into which the 8th and 9th ectoturbinals are continued, are not included in
the drawing (see below).

/—VII: 1.—7. endoturbinals. For the purpose of representing the aperture into sinus 36' the basal lamella
of the 7. endoturbinal has not been drawn in all its length, the ventral part is missing.

2 and 5—36: 2. and 5.-36. ectoturbinals. The basal lamellae indicated by the nos. 25, 26, 29 and 30 belong
to secondary lamellae (cf. text) but have been numbered successively out of regard to the system of the pneumatic
sinuses; the number of ectoturbinals therefore are in this figure raised to 36, which would correspond
to a section through the ethmoideum parallel with that figured in PL 45 fig. 2, but made at a greater distance
from the lamina cribrosa.

In order to keep this drawing as far as possible in accordance with PI. 38 fig. 3 the issuing lines of 1.,
3. and 4. ectoturbinals have not been drawn, as they are not visible when the object is seen sharply in profile.
At the 8. and 9. ectoturbinals contours are drawn of their continuation into the pneumatic sinus; the issuing
line of the 10. ectoturbinal could not be extended to the lamina cribrosa as its dorsal part is covered by the lamella
from the 9. ectoturbinal.

Of the grooves, mentioned in the text, only a single one (a) has been drawn between the 27. and 28. ectoturbinals
.

x foramen ethmoidale.

xx the aperture of a pneumatic sinus.