Falconid^e.] 



OSTEOLOGIA AVIUM. 



[ClRCIN^. 



Measurements. 



Tenths. 



Length of humerus 23 



Length of ulna 28 



Length of radius 25^ 



Length of metacarpus 13 



Length of femur 21 



Length of tibia 29 



Length of metatarsus . ." . . . 24 



Length of sternum 23 



Tenths. 



Breadth of posterior margin of sternum 11 

 Breadth of anterior margin of sternum 9 



Depth of keel 7 



Length of head 19 



Breadth of head 11 



Length of pelvis 21 



Breadth of pelvis 11 



Accipiter, Briss. 



Badius, Gm. , 



Has been made into a genus under the name of Micronisus. The bones of the body 

 are in the British Museum. 



It appears to be similar to Accipiter nisus, but with the sternum slightly longer in 

 proportion to its width. 



Measurements. 



Tenths. 



Length of humerus 



Length of ulna 



Length of radius . 



Length of metacarpus . . . . . 



Length of femur 



Length of tibia 



Length of metatarsus 



Length of sternum . . . ... 17 



Tenths. 



Breadth of posterior margin of sternum 10 



Breadth of anterior margin of sternum 8 



Depth of keel 5 



Length of head 



Breadth of head 



Length of pelvis 18 



Breadth of pelvis 9 



Astue, Lacep. 



Magnirostris, Gm. 

 The whole osteology very similar to Circus, but with the sternum not quite so convex. 



Tenths. 



Length of humerus . . . . . . 29 



Length of ulna 31 



Length of metacarpus 15 



Length of femur 24 



Length of tibia 34 



Length of metatarsus 27 



Length of sternum 17 



6 



Measurements. 



Tenths. 

 Breadth of posterior margin of sternum 12^ 



Breadth of anterior margin of sternum 9 



Depth of keel 4 



Length of head 26 



Breadth of head 4^- 



Length of pelvis 21 



Breadth of pelvis 10 



