Falcontd^e.] 



OSTEOLOGIA AVIUM. 



Measurements (continued). 



Tenths. 



[Aquilin^e. 



Breadth of posterior margin of sternum 25 

 Breadth of anterior margin of sternum 24 



Depth of keel 10 



Length of head . . . . . . . 



Tenths. 



Breadth of head 



Length of pelvis 45 



Breadth of pelvis 11 



Aquila, Meehr. 



Bonelli, Temm. 



A fragment only of this bird is in the British Museum. The sternum has two foramina 

 on the posterior margin, which is slightly excavated in the centre ; the keel does not 

 reach the hinder margin of the sternum. 



Aquila, Mcehr. 



Audax, Lath. 



The head and leg bones were obtained from a skin, and are precisely similar to those 

 of the Golden Eagle, but smaller, and not so powerful. 



Pandion, Sav. 



Haliaetus, Linn. 



Cranium broader in proportion to its length than in Aquila. Lacrymal bones large 

 and broad, tapering towards their points, which are rounded. Palatine bones wanting. 



Sternum similar to Aquila, except in dimensions and in having the keel receding 

 more, with the point somewhat bifid anteriorly. 



The coracoids similar to Aquila, but with the axillary foramen very small. Furculum 

 without any process at the junction of the rami. Scapula similar, but not so much 

 expanded. The whole skeleton weaker. 



Measurements. 



Tenths. 

 Length of humerus 13 



Length of ulna 75 



Length of radius 74 



Length of metacarpus 31| 



Length of femur 31 



Length of tibia 46 



Length of metatarsus 35^ 



Length of sternum 36 



Tenths. 

 Breadth of posterior margin of sternum 21^ 

 Breadth of anterior margin of sternum 21 



Depth of keel 8 



Length of head 42 



Breadth of head . . . . . . . 25-^ 



Length of pelvis 39 



Breadth of pelvis 19 



Illustrations. 



Pelvis, Plate V. fig. 5. 



Sternum, Plate III. fig. 9. 



13 



