222 Annals of the Carnegie Museum. 



with its five h?emapophysial facettes, occupies about half the side of the 

 bone, the spaces among the facettes being deep little concavities with 

 pneumatic holes at their bases. 



Either costal process is tilted outwards, moderately well-developed 

 and subquadrilateral in outline. The carina runs the entire length of 

 the body of the bone. It is deep in front and gradually grows less so 

 as we pass posteriorly. Its lower border is uniformly convex to the 

 front, and near the middle of its side it is strongly marked by the pec- 

 toral muscle-line. Anteriorly, its border is concaved to the front, 

 thickened and scooped out just below the moderately developed and 

 pointed manubrium. 



Immediately below this latter process a single pneumatic foramen is 

 seen, occupying the bottom of the upper part of the aforesaid con- 

 cavity. At the carinal angle we find a large subcircular facet for 

 articulation with the clavicular symphysis of the os furcula. The 

 costal grooves are rather deep and they decussate. They each extend 

 backwards to points just in front of the corresponding base of either 

 costal process. The anterior border of the body of the sternum is 

 markedly convex to the front, and in the mesial portion exhibits a 

 transverse concavity. The fore part of the keel of this sternum pro- 

 trudes anteriorly beyond the manubrial process. There are a number 

 of points in this bone which disagree with the corresponding charac- 

 ters as they are found in the sternum of the true Ibises, the fact that 

 it is 2 -notched instead of being 4-notched, as in the latter family, 

 being one of the most conspicuous ones. 



In the slioulder-girdle the bones are all stout and strong. Os furcula 

 is of the U-shaped pattern, though somewhat inclined towards the V. 

 Its clavicular heads are elongated, thickened, each exhibiting a 

 peculiar twist upon itself, and is distally bluntly pointed. When 

 articulated /;/ situ either of these ends are apparently only connected 

 with the corresponding scapula by ligament. The moderately curved 

 clavicular limbs below the free extremities are subcylindrical in form, 

 and at the enlarged symphysis curve forwards to terminate in a bluntly 

 pointed hypocleidium. At the posterior aspect of this latter, at its 

 apex we find a smooth, flat, subelliptical facet for articulation with the 

 one described above as occurring on the carinal angle of the keel of 

 the sternum. The pneumatic foramina of this bone are found upon 

 the mesial aspects of the distal ends near the apices. 



For the size of the bird the scapula \s a very short bone, being at the 



