CoRVIDiE.] OSTEOLOGIA AVIUM. [CoRVINiE. 



wards, processes uniting them with the sphenoid very broad, broadest at their junction 

 with the lateral splints ; orbits large, upper edges slightly recurved ; deep transverse 

 indentation behind the nostrils. 



Sternum rather short in proportion to its length, and altogether very much resembling 

 that of a Kaptorial bird, slightly rounded on its posterior margin, broader posteriorly 

 than anteriorly ; hinder margin indented with a shallow fissure on each side, rounded 

 anteriorly, and only very slightly contracted posteriorly ; keel deep in proportion to the 

 breadth of the sternum. Manubrial process much shorter and more robust than 

 among Insessores generally. 



Pelvis, as in many other of the Insessores, with three foramina, — the ischiadic, 

 the obturator, and one situated below the femoral joint, and which is divided from 

 the obturator foramen by a much proportionately stronger septum than in the other 

 families of Insessores. 



Eibs with the styliform processes pointed rather abruptly upwards, bluntly rounded 

 at their extremities, very clearly expanded between the styliform process and their 

 upper extremity. 



Furculum much rounded at the junction of the rami, the process extending back- 

 wards from their junction towards the sternum very slight. 



Coracoids strong, deeply articulated into the sternum. 



Scapula only slightly recurved at their hinder extremities. 



Wing-bones strong ; metacarpus long in proportion to the ulna, and the latter long 

 in proportion to the humerus. 



Vertebral column, the first four or vertebrae next the atlas with strong and somewhat 

 lengthened dorsal processes, the fifth with a much slighter one, the sixth rudimental. 



Leg-bones, tibia long in proportion to the femur, the fibula continued for its whole 

 length. 



Measurements. 



Tenths. Tenths. 



Length of humerus 33 



Length of ulna 46 



Length of metacarpus .... 23 



Length of femur 28 



Length of tibia 43 



Length of metatarsus 25 



J 6 l 



Lensrth of sternum 32 



~,5 



Breadth of posterior margin of sternum 20 

 Breadth of anterior margin of sternum 13 



Depth of keel 9 



Length of head 50 



Breadth of head 19 



Length of pelvis 40 



Breadth of pelvis 19 



Corvus, Linn. 



Cor one, Linn, 

 In every respect similar to the foregoing. 

 146 



