16 Osteology of Porzana Carolina. 
5. Mastoidal head and mandibular foot of quadrate 
each have two articular prominences. 
6. Vomer free, deeply cleft behind for the rostrum, 
minutely tricorunate at its anterior apex. 
7. Maxillo-palatines concavo-convex, long, and separated 
from each other in the median line. 
8. Postero-external angles of palatines completely 
rounded off. Their maxillary processes long and very 
slender, being widely apart and nearly parallel to each 
other. 
9. Pterygoids rather short, and lamelliform. 
10. Mandibular angles of mandible truncate below, but 
developing recurved processes immediately behind the 
articular cups. 
11. Occipital condyle small, foramen magnum relatively 
very large. ; 
12. Type of skull holorhinal and schizognathous. 
13. The furcula U-shaped, deep (and as a negative char- 
acter) without hypocleidium. .Scapule long and narrow, . 
coracoids rather short in comparison. 
14. Sternum with lofty costal processes ; notched anterior 
border, rudimentary manubrium, xiphoidal extremity pro- 
foundly cleft once on either side ; carina deep, extending 
entire length of body, which latter, seen from above, is 
long and narrow. 
15. Length of pelvis far exceeds its greatest width. 
Supero-internal margins of preacetabular portions of ilia 
concave, exposing on lateral view the fused neural spines 
of sacral vertebree. Propubis present. Ischiac foramen 
subcircular. Postacetabular portion of ilium develops an 
overhanging ledge of bone (as in Geococcyx). Postpubis 
separated from ischium for its entire length after passing 
the obturator foramen. [Ilio-ischiac notch present on pos- 
terior margin of bone. Ilia extend well beyond the sacrum 
behind. | 
16. Pollex digit of manus supports a claw. 
17..Cnemial crest of tzbzo-tarsus rises above articular 
summit of the shaft. Bony bridge for extensor tendons at 
distal end of the bone, thrown directly across the groove. 
External condyle below it, much larger than the internal 
one, on anterior aspect. Hypotarsus of larso-metatarsus 
grooved only ; mid-trochlea the lowest, inner one the high- 
est on the shaft, and is turned to the rear. Arrangement of 
phalanges of podal digits normal (2.3.4.5), the points long 
and slender, but on the whole harmoniously proportioned 
as to lengths and calibres. : 
