MoTACILLID^.] 



OSTEOLOGIA AVIUM. 



[MOTACILLIN^E. 



Wing-bones, Humerus short ; ulna longer than the humerus. 



Vertebral column having the penultimate and two next vertebrae with dorsal pro- 



cesses. 



Measurements. 



Tenths. 



Length of humerus 7 



Length of ulna 10 



Length of metacarpus .... 5 



Length of femur 7 



Length of tibia 13 



Length of metatarsus 10 



Length of sternum ..... 9 



Tenths. 



Breadth of posterior margin of sternum 6 



Breadth of anterior margin of sternum 4 



Depth of keel 31 



Length of head .... .13 



Breadth of head ...... 5 J 



Length of pelvis 9 J 



Breadth of pelvis ...... 7 



Motacilla, Linn. 



Flava, Linn. 

 Similar to Alba, but smaller. 



Enictjrus, Temm. 



Velatus, Temm. 

 There is no perceptible difference between this bird and Motacilla, with the exception 

 that the leg-bones are rather longer ; and the same may be said of Enicurus maculatus. 



Grallina, Vieill. 



Melanoleuca, Vieill 

 The cranium differs from Motacilla in having only one interorbital foramen, the 

 sternum in having very small, comparatively speaking, foramina on its posterior margin, 

 the manubrial process shorter, the humerus in being longer than the scapula, and 

 the pelvis in being narrower. 



Length of humerus 

 Length of ulna 

 Length of metacarpus 

 Length of femur 

 Length of tibia 

 Length of metatarsus 

 Length of sternum 



Measurements. 



Tenths. 



13 

 16 



9 

 10 

 21 

 16 

 14 



Tenths. 



Breadth ofposterior margin of sternum 7 



Breadth of anterior margin of sternum 6 J 



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



Length of head 19 



Breadth of head 8 



Length of pelvis . . . t . . 13 



Breadth of pelvis 91 



113 



