CRACIDiE.] OSTEOLOGIA AVIUM. [CRACINiE, 



Furculum slightly rounded ; process at the junction of the rami very small, and 

 triangular. 



Measurements. 

 Tenths. 



Length of humerus 24 



Length of ulna 26 



Length of metacarpus 11 



Length of femur 20 J 



Length of tibia 43 



Length of metatarsus 23 



Length of sternum 30 



Tenths 



Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 11 

 Depth of keel ....... 8 



Length of head 30J 



Breadth of head . . • . . . . 10J 



Length of pelvis 38 



Breadth of pelvis 19 



Ortalida, Merr, 



Poliocephala, Wagl, 

 Similar to the foregoing, but smaller, I have also the skeleton of Ortalida hatraca, 

 which is also similar. 



Oreophasis, G, R. Gray. 



Derbyanus, G, R, Gray. 

 I have only the sternum. In general form, it comes intermediate between Crax and 

 Ortalida, but is much more powerful than the latter, and has the fissures on the posterior 

 margin of the sternum of the same shape as both. It agrees again with Ortalida in 

 having the manubrial process short and thick, and the same foramen through it, as 

 in Crax and Ortalida, only much smaller. The furculum is strong, slightly flattened ; 

 the process at the junction of the rami of the same shape as in Ortalida, but more 

 elongated, and narrower ; the scapula is very broad at its distal extremity, and bluntly 

 pointed at the end. 



Illustrations, 



Plate IV. H. (Taken from a specimen brought home by Mr. Salvin.) 



Crax, Linn. 



Globicera, Linn. 



Cranium rounded ; occipital ridge marked ; a lump at base of the bill caused by 

 the intermaxillary bones being much arched. Palatine bones very much expanded 

 towards their hinder extremities, and rather abruptly diminishing at their junction with 

 the interarticulars, which are also much expanded at the two ends. 



Sternum large ; keel deep, the lower edge nearly straight ; fissures of moderate size, 

 the splint bordering the outer one expanded at the extremity, the inner bifid throwing 

 a small branch off at about one-third of its length from the hinder extremity; 

 170 



