60 MR. C. W. ANDREWS ON THE SKULL AND 
line or whether they are separated by the facial process of the premaxill, the 
junction with which is quite indistinguishable. It appears very probable that the 
premaxille ran in between the nasals and formed at least the upper portion of the 
high arch of the culmen between the nostrils, while the upper borders of those 
openings are formed by processes of the nasals; these bones also send processes 
downward and forward, forming the posterior border of the nares, and meeting the 
maxilla below as already mentioned. ‘The angle between the anterior and inferior 
processes is rounded and has a thickened edge. The form and relations of the nasal 
are best seen on the left side of the specimen. 
Immediately within the anterior border of the antorbital fossa, and united with the 
inner face of the downward process of the nasal, is the base of a broad band of bone (eth.), 
which runs vertically down the middle of the fossa parallel to the downward process 
of the lachrymal. ‘The upper end of this band of bone widens out into a fan-shaped 
expansion, the upper edge of which is slightly overlapped by the anterior margin of 
the lachrymal. The lower end, also somewhat expanded, is cancellous, and unites 
with the upturned inner edges of the maxillo-palatine plates, with which the anterior 
ends of the palatines are indistinguishably fused. The narrowest point of this bar of 
bone is about its middle, below which it bears a backwardly-directed triangular 
process. A similar and similarly-situated bar in the ethmoidal region occurs in 
Cariama and also in some Accipitrine birds: eé. g., in a modified form, in Serpentarius. 
The jugal arch is oval in section posteriorly, but in front it is compressed so as to 
form a broad, thin, vertical bar of bone. On the inner side of its posterior end 
there is a rounded knob which fits into a corresponding pit on the outer surface of the 
quadrate. Its anterior end seems to overlap the posterior prolongation of the maxilla. 
The downward precess of the lachrymal articulates with the upper edge of the jugal 
close to its anterior end. 
The form and relations of the maail/a to the surrounding bones are very difficult to 
make out. As just mentioned, its posterior extremity seems to be overlapped by the 
jugal, and in front of this it no doubt formed the edge of the beak for some distance. 
On its inner side it widens out suddenly, the expanded portion being directed 
downward and inward, and forming the large maxillo-palatine plate, with which the 
anterior end of the palatine unites completely. The maxillo-palatine plates have a 
thickened hinder border and are highly convex from side to side, and their upturned 
inner margins unite with the downwardly-directed bar of the ethmoid. The posterior 
border of each maxillo-palatine plate forms a continuous curve with the lower edge of 
the Jugal arch. On either side of the middle line of the palate they form a long ridge 
which projects considerably below the tomium ; the fused anterior ends of the palatines 
must also take part in the formation of this ridge. In the middle line they unite 
for a space of about 3:5 cm., in front of which they are separated by a narrow cleft 
2-3 cm. long; how far they extend in front of this cannot be determined, nor is it 
