MUSOPHAGIDJS.] OSTEOLOaiA AVIUM. [MUSOPHAGKHLE. 



Numbering of the Vertebrae and Bibs in Eeucivores. 



Ceryical. 



Dorsal. 



Sacral. 



Caudal. 



True ribs. 



False ribs 



4 



3 



4 



6 



5 



3 



4 



3 



5 



3 



4 



3 



4 



2 



5 



2 



5 



3 



6 



3 



5 



3 



5 



3 



6 



3 



5 



3 



5 



3 



4 



3 



Cuculus cauorus 



tenuiroatris 



Centropus phasianus .... 

 Phoenicophaus tricolor 



Crotophaga ani 



Piaya Circe 



G-eococcyx mexicanus ... 



Cuculus glandarius 



Chalcites seneus 



Rhamphastos tucanus . . . 



erytkrorhynchus . 



Selenidera maculirostris 

 Pteroglossus Bailloni ... 



Turacus gigas 



Corythaix Verreauxii . . . 

 Buffonii 



12 

 12 

 10 

 9 

 9 

 10 

 12 

 10 

 10 

 12 

 12 

 12 

 10 

 12 

 12 

 12 



7 



11 



7 



12 



8 



12 



7 



12 



8 



12 



7 



12 



6 



10 



7 



12 



8 



10 



9 



13 



8 



11 



8 



10 



9 



11 



8 



13 



8 



13 



7 



13 



General Remarks on Eeucivores. 

 The birds belonging to the Order Erucivores are easily distinguished from those of 

 most other Orders by the elongation of the os pubis, forming either a large spine, or else 

 merely a small tubercle or knob, by the length of the coracoids, the smallness or rudi- 

 mentary state of the furculum, the shortness of the sternum, the shallowness of the keel, 

 and the shortness of the wings. I have not seen a skeleton of Opisthocomus, which is 

 supposed to belong to this Order. 



96 



