A MPELID.E.] 



OSTEOLOGIA AVIUM. 



[Dicrurin^;. 



Sternum broad in proportion to its length ; lateral fissures nearly closed ; keel deep. 

 Pelvis very broad in proportion to its length. 

 In other respects, as in Ampelis. 



Measurements. 



Tenths. 



Length of humerus 11 



Length of ulna 13 



Length of metacarpus 8 



Length of femur 9 J 



Length of tibia 12 J 



Length of metatarsus 6 



Length of sternum 12 



Tenths. 



Breadth of posterior margin of sternum 9 J 

 Breadth of anterior margin of sternum 6 J 



Depth of keel 4 



Length of head 18| 



Breadth of head 7 



Length of pelvis 12 



Breadth of pelvis 12| 



Artamus, Vieill. 



Leucogaster, Valenc. 



Cranium much more convex than in Ampelis and Irena ; orbital foramina very large. 

 Palatine bones damaged. 



Sternum not nearly so strong as in Irena, but with the posterior fissures nearly 

 closed ; keel deep. 



Pelvis of moderate depth, the obturator foramen very large ; humerus short. 



Measurements. 



Tenths. 



Length of humerus 8 



Length of ulna 12 



Length of metacarpus 6J 



Length of femur 6J 



Length of tibia 11 



Length of metatarsus 7 \ 



Length of sternum 9 



Tenths. 



Breadth of posterior margin of sternum 6^ 



Breadth of anterior margin of sternum 5 



Depth of keel 3± 



Length of head 16 



Breadth of head 7 



Length of pelvis 9 \ 



Breadth of pelvis ; 9 J 



Dicrurus, Vieill. 



Densus, Temm. 

 There is scarcely any distinction between this genus and Artamus ; the above species, 

 however, differs in having two foramina on the posterior portion of the sternum, instead 

 of fissures. The other that T possess (Coracinus VerrJ has fissures on the margin, as 

 in Artamus ; the hinder margin of the sternum is also much wider than in Artamus, in 

 proportion to the breadth of anterior edge; the pelvis is also as long as wide. 

 D. Ballicarnassius is similar to Densus. 



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