308 STRUCTURE AND CLASSIFICATION OF BIRDS 



the same arrangement and veins as in Pterocles ; but the 

 caeca no longer run along it, but occur as very short stumps 

 upon the rectum.' 



The cfBca are small and nipple-like ; they may be entirely 

 absent. In Tympanistria bicolor I found one, an especially 

 minute one, on the left side. 



The intestines of the Columbse are very short and volu- 

 minous in some of the fruit-eating forms, moderately long in 

 the majority of forms, and extraordinarily long in Didun- 

 culus. The following are a few measurements : 



Ft. I IK. Ft. Ins. 



Carpophaga cenea . 1 6 Chryscena viridis . 1 



Chalcopkaps chnjso- Macropygia lepto- 



clilora . . .18^ grammica . . 2 10 



Phlogcenas Stairi . 2 6 Peristera Geoffroiji 10 



,, 



cruentata 2 



lanthoenas Icuco- 

 losma . 3 11 



Columba maculosa . 2 8 



Geopelia cuneata . 8| Goura coronata . 5 1 



,, Jiiimilis .16 ,, Victor ice . 4 



Ptilopus jambu . 1 Phaps clialclwptera 2 6 



,, melanoce- 

 phalus . . 9 

 Ptilopus coronulatics 6 



,, clegans . 1 

 Didiinculus K 



rostris 1 



In Goura Victoria the tensor brevis muscle is bordered 

 on the patagial side for the last half af its course by a strong 

 tendon, which arises from the pectoralis muscle. Below this 

 tendon forms the outer and stronger part of a thin and 

 rather wide tendon, in which the muscle itself ends. A 

 wristward slip is given off, but there is no patagial fan. The 

 biceps slip arises tendinously from the biceps, has a short 

 muscular belly, and ends tendinously upon tensor patagii 

 longus tendon. 



Goura coronata is much the same, but the biceps slip is 

 (? exceptionally) digastric, a second tendon springing from 

 tensor patagii longus muscle, and becoming muscular before 

 it joins the muscular belly derived from biceps itself. 



In other pigeons and this is one of the most salient 



