Osteology of Porzana Carolina. 13 
cally grooved in the median line above, while the lower 
margin of this part of the bone, is convex, and embellished 
with a raised rim. 
Finally, the coracoidal grooves are very long, being 
carried clear across the base of either costal process to the 
lateral border. They do not quite meet in the median line. 
Passing to the lateral xiphoidal projections formed by the 
deep clefts referred to above, we find them to be slightly 
curved, very long, of a uniform width, and somewhat en- 
larged at their ends. 
The middle part of this hinder portion of the sternum has 
the form of an isosceles triangle with a short base, and its 
apex pointed to the rear, being at the same time within the 
imaginary line joining the ends of the lateral xiphoidal 
limbs. 
Were this part of the sternum entire, then on its dorsal 
aspect we should have quite a concavity presented us, and 
this is the case with that part of the bone lying between 
the costal processes and in front of the aforesaid clefts of its 
hinder extremity. 
OF THE APPENDICULAR SKELETON :—In an adult specimen 
of Porzana carolina | find the humerus to be 3.6 cms. long ; 
the ulna 3, and the pinion 3.7 cms. long. A slight curve 
marks the shaft of the humerus about its middle, and on 
the radial side where it is convex. The ulnar crest at the 
proximal end of the bone is prominent, being separated 
from the humeral head by a deep notch, while the pseudo- 
pneumatic fossa it circumscribes is notably shallow. The 
radial crest is short, and not very striking. 
An examination of the distal extremity of the humerus 
reveals nothing worthy of especial remark. It has a small 
ectocondyloid process in addition to the other common or- 
nithic characters usually seen there. 
With the bones of the antibrachium, we have a straight 
and slender radius, and an ulna that exhibits considerable 
of an arch along the proximal third of its shaft. The pa- 
pille for the secondary quill feathers are present though 
not very distinct. 
Two free segments, as usual, are found in the carpal ar- 
ticulation, while the carpo-metacarpus has nothing peculiar 
