Freiburger historische Bestände - digital

EXPLANATION

OF

PLATE 29.

Fig. 1—3. The skulls of the Elephants c, e, h respectively, seen from above, the bony wall covering the
air-sinuses on the upper side of the skull having been cut away. The drawings of the skulls figs. 1 and 3 were
made before the air-sinuses on the lateral wall had been exposed, as shown in figs. 3 and 4 on PL 28, which
represent a later stage in the preparation.

Fig. 4—6. The same skulls seen from behind. A comparison of the figures shows the increasing extension
of the air-sinuses in the occipital wall of the braincase with increasing age.

Gomp. for fig. 1: PL 43 fig. 3, for fig. 3: PI. 44 fig. 3, for fig. 4: PL 43 fig. 4, for fig. 6: PL 44 fig. 2.