1903.] OSTEOLOGY OF THE CUCULIFORMES. . 29 
REFERENCES. 
(1) Bepparp, F. E.—Classification of Birds. 1898. 
(2) Firsrixcer, M.—Vergleich, Anat. (. Brustschulterapparates. 
Theil v.: Vogel. 1902. 
(3) Gapow, H.—Bronn’s Thier-Reich. Bd. vi. Vigel. Syst. Theil. 
1893. 
(4) Parker, W. K.—Trans. Linn. Soe., 2nd ser. Zool. vol. i., 1879. 
xii; EXPLANATION OF PLATE XXII. 
Fig. 1. Ventral aspect of the skull of Coua veynaudi, showing the most primitive 
form of the indirectly desmognathus skull of the Cuculide. Herein the 
maxillo-palatines do not meet in the middle line, but the palate is bridged 
by the swollen nasal septum. Basipterygoid processes are wanting. There 
is no vomer. 
Fig. 2. Ventral aspect of the skull of Twracus buffoni, showing the indirectly desmo- 
gnathous type of palate of the Musophagide. The maxillo-palatines do not 
meet in the middle line, but the palate is bridged by the fusion of the ventral 
border of the nasal septum with the dorsal aspect of the maxillo-palatines. 
The vomer is wanting, but present in a vestigial condition in Schizorhis. 
Note the appearance of the parasphenoid between the palatines. 
3. Dorsal aspect of the skull of Coua reynaudi, showing the absence of a nasal 
hinge, and the general character of the root of the skull. 
Fig. 4. Dorsal aspect of the skull of Turacus leucotis, showing the nasal hinge and 
the general conformation of the root of the skull. 
. Dorsal aspect of the skull of Sawrothera vetula, showing the long upper jaw 
and the large temporal fossz. 
6. Lateral aspect of the skull of Schizorhis zonura, showing the form of the 
narial apertures, the os weeinatum and the general form of the skull. 
Fig. 7. Lateral aspect of the skull of Rhinococeya calorhynchus, to show the form 
8 
9 
= 
Ig 
ou 
of the narial aperture and the general form of the cranium. 
. Lateral aspect of the skull of a nestling Centropus, showing the arrangement 
of the bones. Outer view. 
. Lateral aspect of the inner view of the same skull, showing the separate 
arrangement of the bones. 
Fig. 10. The distal end of the pterygoid of the nestling Centropus, to show the 
hemipterygoid. 
Explanation of Letters. 
als.=alisphenoid. n.h.=nasal hinge. 
a.p.=antorbital plate. op.=opisthotic. 
a.p.v.=anterior palatine vacuity. 0.u.=0s8 uncinatum. 
}.oc.=basioccipital. p-=parietal. 
b.s.=basisphenoid. p.a.=palatine. 
e.=occipital condyle. par. =parasphenoidal rostrum. 
ep.o.=epiotic. p.0.p.=postorbital process. 
ex.0.=exoccipital. pro.=prootic. 
-f.=tloccular fossa. pt.=pterygoid. 
v.=tfrontal. g-=quadrate. 
h.pt.=hemipterygoid. s.c.=sagittal crest. 
.=lachrymal. s.0.=supraoccipital. 
me.=imeatus internus. sq.=squamosal. 
mes.=mesethmoid. t.f.=temporal fossa. 
na.=nasal. 
