PSITTACID^E.] 



OSTEOLOGIA AVIUM. 



[Abinje, 



The skeleton from which the above description has been taken is in the British 



Museum, and is very much diseased, having probably died in confinement of mollities 



ossium. 



Measurements. 



Tenths. 



Length of humerus 21 



Length of ulna 25 



Length of metacarpus 14 



Length of femur 30 



Length of tibia 38 



Length of metatarsus 15 



Length of sternum . . . . . . 25 



Tenths. 

 Breadth of posterior margin of sternum 20 

 Breadth of anterior margin of sternum 15 



Depth of keel 



Length of head 34 



Breadth of head 19 



Length of pelvis 38 



Breadth of pelvis 21^ 



Subfam. 4. Arin^e. 

 Ara, Briss. 



Macao, Linn. 

 Two specimens of this bird are in the British Museum : one has the foramina near the 

 posterior margin of the sternum perfect ; the other, evidently a younger bird, has them 

 open, forming fissures. The form of the bones is very similar to Cacatuinw ; but the 

 sternum is more constricted behind the junction of the ribs ; keel of the sternum carried 

 forwards to the end of the manubrial process, which is bifurcate and bent upwards. 



Measurements. 

 Tenths. 



Length of humerus . . . . . 35 



Length of ulna 43 



Length of metacarpus 28 



Length of femur ...... 26-^- 



Length of tibia 35 



Length of metatarsus 14 



Length of sternum 37 



Tenths. 



Breadth of posterior margin of sternum 18 

 Breadth of anterior margin of sternum 16 



Depth of keel 1\\ 



Length of head 47 



Breadth of head 22 



Length of pelvis ...... 40-^ 



Breadth of pelvis 19 



Ara, Briss. 



Hyacinthina, Lath. 



Similar to the last, but with the manubrial process more bent downwards, and not so 

 deeply bifurcate. 



Measurements. 



Tenths. 

 Length of humerus 35 



Length of ulna 47 



Length of metacarpus 27 



Tenths- 

 Length of femur ....... 28 



Length of tibia 38 



Length of metatarsus 14 



73 



