1905. | OSTEOLOGY OF THE EURYLEMID&, AD 
components of the synsacral vertebra are shorter, so that the 
diapophyses of the first precaudal are overlapped by the hinder 
ends of the innominate. 
Well-marked intercentra appear on caudals 5-7, in each of the 
three genera here described. 
v. Tur Rips. 
The cervical ribs extend from the 4th to the 12th vertebre. 
The Ist and 2nd, 10th and 12th, are represented by little more 
than broad pleurapophysial lamelle; in the remaining vertebre, 
however, these lamelle are narrow and band-like, and the ribs 
slender and styliform, extending the whole length of the centrum. 
There are 3 cervico-thoracic ribs. ‘The first is reduced, only the 
capitulum and tuberculum remaining connected by a common base. 
The second is long, but bears no uncinate ; the third bears a short 
sternal segment, which, however, does not reach the sternum. 
There are 5 thoracic ribs, of which 4 only reach the sternum. 
The uncinates are long and extend backwards to reach the 3rd rib 
from their base of attachment. 
In Corydon the sternal segment of the 5th rib articulates by a 
special facet with the sternal segment of the rib next in front. 
vi. THE STERNUM AND SHOULDER-GIRDLE. 
(Text-figs. 13, 14, pp. 46, 47.) 
The sternum of the Hurylemide is typically Passeriform, and 
presents no very close resemblances to that of any other group. In 
some features it recalls that of the Cuckoos, in others of the 
Caprimulgi, but these are not of a nature likely to cause difficulty 
in confounding the sterna of either of these groups with Passerine 
sterna. 
In the Kurylemide the corpus sterni is short and broad—the 
breadth nearly equal to the length. The posterior lateral processes 
are long, extending forwards to a point corresponding to a trans- 
verse line through the middle of the corpus sterni; the free ends 
of these processes are spatulate. The metasternum has its free 
border squarely truncate, so as to form a continuous line with the 
free ends of the posterior lateral processes; broken only by the 
notch enclosed by this process. ‘The anterior lateral processes in 
Calyptomena have their free ends truncated and curved slightly 
backwards. In Corydon these processes are long, pointed and 
directed forwards. Cymbirhynchus is intermediate in this respect, 
the process being long, truncate, and directed forwards. The 
articular surfaces for the sternal ribs are confined entirely to these 
processes, 
There is no spina interna. The spina externa shows only the 
faintest indication of the bifurcate free end which prevails among 
the Passeriformes (text-fig. 13, s.e.). In Cymbirhynchus and 
Corydon this spine is triangular in section; in Calyptomena it 
