52 ON THE AXIAL SKELETON OF THE STRUTHIONID2. 
Struthionide in having long sacculated ceca coli and no aftershaft to the contour- 
feathers; while Apterya differs from Casuarius and Dromeus in having the ceca coli 
well developed, an extra femoro-caudal muscle, and an ambiens of extra size. 
Fig. 44. 
Casuarius. 
agate Dromans. He 
al se / “205, 
| ‘ SS / / 7% 
N 
whorl yr 
The affinities of the Struthious genera, as manifested by their axial skeleton, may, 
perhaps, then, be represented as shown in the accompanying diagram (fig. 44). 
