OltlOLIDiE.] 



OSTEOLOGIA AVIUM. 



[Sternin^e. 



Measurements. 



Tenths. 



Length of humerus ..... 14 



Length of ulna : 18 



Length of metacarpus .... 10 



Length of femur 12 



Length of tibia 20 



Length of metatarsus 11 J 



Length of sternum 15 



Tenths. 



Breadth of posterior margin of sternum 9 



Breadth of anterior margin of sternum 7 



Depth of keel ....... 4J 



Length of head * 21 



Breadth of head 8 



Length of pelvis ...... 16 



Breadth of pelvis 9 



Sternopastor, Hodgs. 

 Jalla, Horsf. 

 The bird may at once be distinguished from the preceding by the shortness of the 

 sternum in proportion to its width. 



Sternella, Vieill. 



Ludoviciana, Linn. 

 Distinguished from all the other Sternina by the enormous fissures on the posterior 

 margin of the sternum, the greater proportionate depth of the keel, and the great 

 breadth of pelvis in proportion to its width. 



Measurements. 



Tenths. 



Tenths. 



Length of humerus 11 



Length of ulna 14 



Length of metacarpus ....... 8 



Length of femur 14 



Length of tibia 22 



Length of metatarsus IT 



Length of sternum .14 



Breadth of posterior m argin of sternum 8 

 Breadth of anterior margin of sternum 7 



Depth of keel 5| 



Length of head 22 



Breadth of head 7 



Length of pelvis 14 



Breadth of pelvis 11 



Cassicus, Cuv. 



Bifasciatus, Spix. 

 Cranium with the vertex very flat, with a protuberance behind the nostrils; occiput 

 with a very distinct occipital ridge ; upper edge of the orbits slightly recurved; orbital 

 septa with a large foramen. 

 Pelvis similar to Sternus. 



Sternum with the posterior foramen rather small ; manubrial process much shorter 

 than in Sternus, but shallow. 

 136 



