364 



PROF. A. H. GARROD ON THE 



[Apr. 1, 



first semiring with the last tracheal at its (should be) articulating 

 spot. 



The pessulus is broad ; and the angle on each side of its posterior 

 blending with the penultimate ring runs a short way into the latter 

 so as to reduce its depth a little at the spot. The interannular inter- 

 vals are the same as in E. swinhoii, except the one between the ante- 

 penultimate and penultimate rings, which is interrupted in front by 

 the narrow cartilaginous isthmus between them. Above this the 

 following twelve rings or so touch all round ; and they are suc- 

 ceeded by typically interlocking rings in the cervical portion of the 

 tube. It must be also mentioned that whilst the plane of the penul- 

 timate tracheal ring is transverse, that of each lateral moiety of the 



Fig. 11. 



Fig. 12. 



Front view. 



Back view. 



Euplocamus albocristatus. 



last one, as well as the first bronchial semiring, runs upwards from 

 its more fixed median anterior and posterior parts. The plane of 

 the second semiring makes an angle of some 15° with the first. 



In this last respect, as well as others, the genus Phusianus differs 

 from Euplocamus. In Phasianus wallichii, P. colchicus, and P. 

 versicolor the plane of each tracheal ring, as well as that of the 

 uppermost bronchial semirings, is nearly, if not perfectly, transverse. 

 The whole trachea narrows slightly at its lower end, to expand again 

 opposite the last two or three rings. As in Euplocamus, the last 

 three rings fuse in the middle line behind, as do the last two (in 

 P. wallichii the last three) in front, whilst in adult birds the an- 

 terior extremities of the first and second semirings participate in the 

 blending, as does the pessulus posteriorly. In P. colchicus and P. 

 versicolor (which differ from P. wallichii about as much as Euplo- 

 camus swinhoii does from its allies) there is a robustness about the 



