Falconid^e.] 



OSTEOLOGIA AVIUM. 



[Aquiline. 



Ribs similar to Falco, but with the posterior end of the styliform process carried much 

 further downwards. 



Coracoids and scapula very similar to Falco, but with the latter more expanded, and 

 the coracoids perforated with a large axillary foramen. 



Furculum with a slight process at its junction with the sternum. 



The metatarsal bones are without the mesometatarsal ridge extending from the calcaneal 

 process. The remainder of the skeleton is very similar to Falco, except in measurements. 



Measurements. 



Tenths. 



Length of humerus 75 



Length of ulna 86 



Length of radius 82 



Length of metacarpus 41 



Length of femur 44 



Length of tibia 65 



Length of metatarsus 40 



Length of sternum 50 



Tenths. 

 Breadth of posterior margin of sternum 25 

 Breadth of anterior margin of sternum 24-| 



Depth of keel 12 



Length of head 48 



Breadth of head 25 



Length of pelvis 55 



Breadth of pelvis 28 



Illustrations. 



Palatine bones, Plate VI. fig. 6. 



Sternum, Plate I. fig. 1. 



Aquila, Mcehr. 



Nsevia, Gm. 



Lacrimal bones very broad and long, extending half-way over the orbits, rounded at 

 their extremities. Palatine bones damaged. 



Sternum with a small foramen on each side; in other respects similar to Aquila 



chrysa'etos. 



Illustration. 



Sternum, Plate III. fig. 14. 



Aquila, Mcehr. 



Imperialis, Bechst. 

 The body of this bird is in the British Museum ; it does not appear to differ from 

 A. chrysa'etos. 



Measurements. 



Tenths. 



Length of humerus . 

 Length of ulna . . 

 Length of radius . . 

 Length of metacarpus 

 12 



Tenths. 

 Length of femur ....... 



Length of tibia 



Length of metatarsus 



Length of sternum 48 



