150 MR. ¥F.E. BEDDARD ON THE SYRINX AND OTHER [Mar. 2, 
Sharpe for the opportunity of examining a syrinx of this bird. The 
accompanying drawing (fig. 3) illustrates the syrinx as seen from 
behind. 
The last ring of the trachea is complete in front and incomplete 
behind. The intrinsic muscles are attached to the middle of the sixth 
bronchial semiring, though, when viewed from behind, it would appear 
that the seventh bronchial semiring served for the attachment of these 
muscles ; this appearance is caused by the incomplete terminal tra- 
cheal ring. The six anterior bronchial semirings are ossified and firmly 
united to each other and to the trachea; both the anterior and poste- 
rior extremities of the successive semirings are united by a continuous 
bar of cartilage. The remaining bronchial semirings differ to a very 
Fig. 3. 
Syrinx of Batrachostomus. 
marked degree from the anterior ones ; they are slender and unossified, 
and separated by widish membranous intervals; there are about ten 
of these rings in either bronchus. The membrana tympaniformis, 
which unites together the opposite sides of each bronchus, forming 
its inner wall, is of equal diameter both in the posterior and anterior 
regions of the bronchus; there is a marked constriction, however, at 
the point which divides the anterior from the posterior region of the 
bronchus. 
Podargus cuvieri.—The syrinx of this Goatsucker appears to be 
formed upon the same type as that of Batrachostomus, and to show 
the same characters even to a greater degree. I have not been able 
to examine the organ itself; the following remarks are based upon 
a sketch made by the late Prof. Garrod’. 
! There is a brief description, unaccompanied by any figure, in Stannius’ 
‘Lehrbuch der Vergleichenden Anatomie,’ Bd. ii. p. 321. 
