1903. ] OSTEOLOGY OF THE CUCULIFORMES. 283 
phagi, the preilium rises upwards and sweeps inwards in the form 
of a broad vertical blade with a gently rounded dorsal border, 
which ultimately meets and fuses with the synsacral crest, termi- 
nating in a truncated anterior border cephalad of the synsacral 
fusion. The canalis ilio-lumbalis is wide and spacious, The 
dorsal plane of the postacetabular ilium is moderately wide, and 
tapers posteriorly into a blunt, slightly upturned point. Its free 
outer border is somewhat thickened in Z'uwracus to form a broad 
lip with sharply defined upper and lower edges; the inferior of 
these edges, immediately behind the ilio- ischiadic for: amen, 1S pro- 
duced into a blunt spine. In Sehizorhis the free border of the 
dorsal plane is sharply defined, so that the blunt point caudad of 
the ilio-ischiadic foramen is apparent on the dorsal aspect of the 
pelvis, instead of below this level. The ilio-ischiadic foramen is 
relatively much smaller in Z’wracus than in Schizorhis. The ischium 
expands caudad into an extremely broad plate, especially so in 
Turacus. The free hinder border of this plate is slightly convex. 
In Turacus the obturator foramen is cut off from the fissure of 
that name by a descending plate of bone from the ischium. This 
is not the case in Sehizor his, the foramen and the fissure being 
confluent. The pubis is very long, attached for some distance 
poster iorly to the ventral border or the ischium. The pectineal 
process is large in both the genera in question. 
The fovea lumbalis is larger than in the Cuculi, and the fovea 
ischiadica is distinct from ‘the fovea pudendalis, the latter being 
cut up into separate compartments by the synsacral ventri-later: al 
processes. The iliac recess is fairly spacious. 
vill. THE Pecrorat Limp, 
The character of the wing is very uniform throughout the 
group. The humerus only is pneumatic. Most nearly resem- 
bling that of the Trogons in its general character, the limb of 
the Cuculiformes may be distinguished by the greater size of the 
pectoral crest of the humerus, which forms a linguiform or even 
triangular plate, and by the prominent collum trochlee, the 
strongly bowed curve of metacarpal TIT. ., and the absence of a 
backwar dly projecting spur on the upper 3 of metacarpal IT. 
In the humerus the coraco-humeral groove (sulcus transversum) 
is wanting. The crista superior is cently arched, rising from the 
base of the tuberculum externus ee ter minating about the upper 
3 of the shaft. In some cases, e. g. Crotophaga, “the pectoral crest 
may be more or less eed ‘instead of rounded. There is a 
very small ectepicondylar “tubercle. The pneumatic foramen is 
small; the incisura capitis sharply defined. The humerus of the 
Musophagi may be distinguished from that of the Cuculi by the 
fact that in the former the proximal border of the crista superior 
is long, low, and concave, the distal border short and strongly 
arched, 
In the Cuculi there is considerable variation in the relative 
