of the Radiated Fruit-Cuckoo. 



203 



resemblance. It is not, however, in my opinion, necessary 

 on this account to place the two genera in especially close 

 proximity, a proceeding which geographical considerations 

 do not favour. I am inclined to believe that the peculiar 

 form of the bronchi of these two Cuckoos may have been 

 independently arrived at by a closing up of the rings in 



Fio-. 20. 



Fig. 21. 



Syrinx of Carpococcyx radialus 

 (nat. size), anterior view. 



The same, lateral view. 



the upper region of the bronchi like those of the Old- World 

 Centropus or of the New-World Geococcyx. These two 

 genera, in fact, seem so far as their windpipes are con- 

 cerned, to present us with an intermediate stage between 

 the typical tracheo-bronchial syrinx of the Phoenicophainse 

 and the extraordinarily specialized bronchial syrinx of Croto- 

 phaga and of ('arpococcyx. 



