161

137

DESCRIPTION OF THE PLATES.

PLATE XVI.

Fig. 1. Back view of the cranium of Dinornis struthioides.
2. Side view of ditto.
3. Upper view of ditto.
4. Under view of ditto, mutilated.
1. Basi-occipital.
1'. Occipital condyle.
3. Superoccipital plate.
r. Superoccipital ridges.
d. Superoccipital impressions.
4. Paroccipital process.
5. Carotid canal in basispenoid.
6. Foramen ovale in alisphenoid.
n. Foramen rotundum.
o. Foramen opticum.
7. Parietal portion of cranium.
8. Mastoid process.
11. Frontal portion of cranium.
11'. Orbital plate of frontal.
12. Postfrontal prominence.
18. AEthmoidal cavities for organ of smell.
28. Articular depression for os tympanicum.
5. Upper view of the dried head of the Dodo (didus ineptus), preserved in the
Ashmolean Museum at Oxford.
n. Nostrils. (All the figures are of the natural size.)

PLATE XXXI.

Fig. 1. Upper view of the skull of the Emu (Dromaius Nova Hollandiae).
2. Under or base-view of ditto, wanting the lower jaw and right tympanic bone.
3. Side view of cranium of ditto.
4. Side view of cranium of Dinornis dromioides.
5. Upper view of ditto.
6. Under view of fore part of cranium of ditto. The small numerals indicate
the same parts as in Plate XVI.
7. Portion of os tympanicum of Dinornis giganteus.