.Oeiolidje.] osteologia avium. [Icterinjs. 



Coracoids rather long. 



Femur longer in proportion to the tibia than in Sturnus. Metatarsus with a 

 slight keel. 



Tenths. 



Length of humerus ..... 18 



Length of ulna 25 



Length of metacarpus 11 



Measurements. 



Tenths. 



Breadth of posterior margin of sternum 1 1 

 Breadth of anterior margin of sternum 9 

 Depth of keel 4 



Length of femur 16 



Length of tibia 28 



Length of metatarsus . . . . . 17 



Length of sternum ...... 17 



Length of head . 

 Breadth of head . 

 Length of pelvis 

 Breadth of pelvis 



35 

 11 

 18J 



Hi 



Illustration. 

 Plate X. F. 



Cassicus, Cuv. 



Cristatus, Gm. 

 The only difference I can detect between this bird and the foregoing is that the 

 fissures on the posterior margin of the sternum are smaller, and the pelvis rather 

 shorter. 



Measurements. 



Tenths. 



Length of humerus . .... 11 



Length of ulna .13 



Length of metacarpus 7 



Length of femur ...... 10 



Length of tibia . 15 



Length of metatarsus 13 



Length of sternum ...... 13 



Tenths. 



Breadth of posterior margin of sternum 7| 

 Breadth of anterior margin of sternum 5 J 



Depth of keel . 4 



Length of head ....... 18 



Breadth of head 8 



Length of pelvis 12 



Breadth of pelvis ...... 7 J 



Icterus, Briss. 



Melanocephalus, Wagl. 

 Very similar to Cassicus, but with the posterior marginal fissures of the sternum 

 smaller and nearly closed, the sternum of the same width both before and behind, and 

 having the ulna and humerus very nearly the same length. 



u 137 



