PLATE VIL. 
Skulls of Apteryx Australis and Numenius urcuatus. 
Fig. 1. Upper surface of the skull of the Apteryx Australis, male. 
. Under surface of the same. 
Upper surface of the skull of the Ibis (Numenius arcuatus). 
Under surface of the same. 
Posterior surface of the skull of the Apteryz. 
Upper surface of the lower jaw of the male Apteryx. 
Under surface of the same. 
Os hyovdes. 
PLATE VIII. 
Skeleton of the male Apteryz, one half the natural size. 
PLATE IX. 
Fig. 1. Under surface of the bony compages of the thoracic, abdominal, and pelvic 
cavities, with the sternum and sternal ribs removed. 
2. Under or external surface of the sternum. 
a. ‘The perforations*. 
b. The posterior fissures. 
c. The broad anterior emargination. 
d. The articular notch for the coracoid. 
e. The coracoid. 
f. The rudiment of an acromial clavicle. 
g. The scapula. 
h, h. The sternal ribs. 
3. The upper or internal surface of the sternum. 
h. The articular cavities for the sternal ribs. 
4. Posterior or internal surface of the anchylosed scapula and coracoid. 
* In the skeleton of a half-grown Apteryx which I have received since the foregoing Memoir was printed, 
as in the young Ostrich, of two symmetrical osseous plates, united at the middle line by 
the sternum consists, 
is sternum was, therefore, perforated; and the structure of the 
cartilage. Neither of the lateral halves of th 
sternum of the male Apteryx represented in Pl. IX. figg. 2 and 3 may prove to be a variety. 
