Ra ea aa a i ee Reh BNL Tee sa 
ae 
ae 
ON THE TRACHEA OF THE GALLINZE. 503 
Pipile, and Aburria the first bronchial semirings are thicker and 
stronger than in Crag and its near allies, their posterior articulations 
Fig. 34. | Fig. 35. 
Aburria caruncutata. 
with the ends of the last tracheal ring being upon what becomes the 
outer, but normally would be the inferior surfaces of its juxtapessular 
terminations, because of a characteristic downward flexure of their 
expanded obtuse extremities. 
The lateral intrinsic tracheal muscles are thin, and run down to 
“cease opposite the ring fifth from the bifurcation of the tube, as in 
nearly all Gallinaceous birds. I cannot trace any fibrous continuation 
to the lower rings from their muscular extremities. 
Incidentally it may be mentioned, with reference to the develop- 
ment of the extrathoracic tracheal loop in the Cracide, that, as far 
as my facts go, this loop is found in the males only of the genera Page 380. 
Craz, Pauzxis, and Mitua; whilst in Penelope purpurascens, P. cris- 
tata, Pipile, and Aburria it is wanting in both sexes, it being present 
in both sexes of Penelope jacucaca. Im the males of Penelope 
ptleata and Ortalis albiventris* it is. present; the females I have not 
seen. 
The flattening of the trachea of the male Cracinew, excellently de- 
picted (inverted) in Temminck’s figure of the windpipe of Oraz alector,t 
is lateral or from side to side, so that the well-known anterior and 
* Vide Temminck, loc. cit., pl. viii. fig. 1. 
+ Loe. cit., pl. v. tig. 1. 
