244. Mr. W. P. Pycraft on the 
The Skull of the Nestling (text-fig. 20). 
For an opportunity of studying the skull of the nestling 
Coly, I am indebted to the kindness of Mr. D. Seth-Smith, 
who furnished me with three nestlings of C. affinis. 
The Cartilage-bones. 
The basioccipital is short, rather narrow, and sharply 
cut off in front from the basitemporal plate. 
The exoccipital, or lateral occipital, in these skulls is not yet 
completely ossified, the tympanic ring being cartilaginous. 
Text-fig. 20. 
Lateral aspect of the skull of nestling Colius affnis, to shew 
the form and relations of the squamosal. 
als.=alisphenoid, | pa.=palatine. 
fr.=frontal. | g.=quadrate. 
p. = parietal. | 8.0cp.=supraoccipital. 
p.o.p.=postorbital process. |  sg.=squamosal, 
pt.=pterygoid. 
Only by means of its extreme supero-internal angle does it 
come into contact with the parietal; and in this it differs 
from that of the Cypselide, wherein almost the whole dorsal 
border is apposed to the parietal. 
The swpraoccipitai is paired, and extends upwards for a 
considerable distance to form, with its fellow, a full rounded 
contour, 
The pro-, epi-, and opisthotic bones are now completely 
