of the Radiated Fruit-Cuckoo. 213 



which only the last two bear ribs. The atlas is perforated 

 for the odontoid process, not notched, as in Scylhrops and 

 Eudynamis. There is no catapophysial canal formed, in which 

 respect the genus agrees with Scythrops and Eudynamis ; 

 also, as in both these genera, the single median hypapophysis 

 is first developed upon the 10th vertebra. Five ribs reach the 

 sternum, there being thus one more than in Eudynamis and 

 Scythrops. In addition, there is a tiny remnant of an eighth 

 rib attached to the middle of the seventh, of which still 

 more minute vestiges occur in Scythrops. The last dorsal 

 vertebra, as in the two genera with which I am comparing 

 Carpococcy.v, is fused with the sacral series. But in Carpo- 

 coccyx, contrary to what is found in Eudynamis and Scythrops, 

 the last median hypapophysis is on the second dorsal vertebra ; 

 in the two last-mentioned genera it is upon the first. 



The vertebral column and ribs therefore of Carpococcyx 

 distinguish it from Scythrops and Eudynamis, Avhich are 

 naturally more nearly allied to each other. 



Sternum. — The sternum is marked on either side by a 

 shallow notch, as in Scythrops, but the bone is not so much 

 wider posteriorly than anteriorly, as is the case with Scythrops. 

 The notches are a trifle deeper than in Scythrops, but not so 

 deep as in Eudynamis, where, however, there is, as in Carpo- 

 coccyx, no marked widening of the sternum posteriorly. 



Hind limb. — The proportions of the several segments of 

 this limb naturally distinguish the ground-living Carpococcyx 

 from its arboreal allies. I append a few measurements 

 (in millim.), among which I also include those of the hind 

 limb of the '' lload-runner," Geococcyx. 



Carpococcyx 

 Geococcyx , 

 Scythrops . 

 Eudynamis . 

 Saurothern . 

 Di2)lopterus 



Quira 



Piaya 



