MUSOPIIAGI 



283 



Corythaix erytli nilopli us 

 ,, albocristat<! 

 ,, persa 



Musophaga violacca . 



Sell izo rh is africanus 



17 inches 



18 



18 

 18 

 20 



The windpipe of Corythaix persa is slightly swollen 

 along its course, narrowing again at the bifurcation. It is 

 much ossified. Counting as 

 the last tracheal ring that to 

 which the pessulus is attached 

 in front, the intrinsic muscles 

 are inserted on to the third 

 in front of this. The first 

 two bronchial semi-rings are 

 ossified ; the third, between 

 which and the second there is 

 a considerable membranous 

 interval, is the first of the 

 purely cartilaginous series. 

 The extrinsic muscles are 

 stout, and arise seven or eight 

 rings from the end of the 

 trachea, and pass at once to 



their insertion ; they run no distance along the trachea, as is 

 so common. 



Musophaga has no intrinsic muscles ; Schizorhis has. 



As to muscles, the tensores patagii are very simple, and 

 the biceps slip is entirely absent. 



The tensor breves sends off a wristward slip just before 

 its insertion in both Musophaga and Conjthaix ; l it is 

 reinforced by a pectoral slip and by a fibrous slip from the 

 humeral crest. 



The anconceus long us has not, at any rate in Corythaix 

 albocristata, a humeral head. Glutceus I. is large, covering 

 the biceps ; glutans V. is absent (Corythaix erythrolophiix, 

 Musophaga} or present (Schizorhis africanus}. The muscle 



Flft - ^.INTESTINES OF 



ehlorochlamys (AFTER MITCHELL). 

 ^shorWircuiting vessel divided. 



1 Absent perhaps as an individual variation in C. albocristata. 



