Alaudid^.] 



OSTEOLOGIA AVIUM. 



[Alaudin^e. 



Measurements (continued.) 



Tenths. 



Length of sternum 9 



Breadth of posterior margin of sternum 6 



Breadth of anterior margin of sternum 4 



Depth of keel 2§ 



Tenths. 



Length of head ...... 14 



Breadth of head 6 



Length of pelvis 11 



Breadth of pelvis 6 



Alauda, Linn. 



Arborea, Linn, 



There is no distinctive osteological character that I can discover between this bird 

 and Arvensis, except measurement. 



Measurements. 



Tenths. 



Length of humerus 

 Length of ulna . . 

 Length of metacarpus 

 Length of femur 

 Length of tibia . . 

 Length of metatarsus 

 Length of sternum . 



H 



12 



6 



n 



13 

 10 

 10 



Tenths. 



Breadth of posterior margin of sternum 6 



Breadth of anteriormargin of sternum 4J 



Depth of keel ....... 3 J 



Length of head 1 3 j 



Breadth of head ...... 6 



Length of pelvis 11 



Breadth of pelvis ...... 7 



Otocoris, Bon, 



Alpestris, Linn. 



In general similar to Alanda, but differs in the external edges of the fissures on the 

 posterior margin of the sternum being broader, and gradually tapering forwards, con- 

 sequently making the fissures rather narrower; and in there being a distinct im- 

 pression on the upper plane of the iliac bones over the sacral vertebras to the first 

 caudal one, with a ridge on each side ; and also in having the bulbous appearance on 

 each side of the ilium ; posterior to the acetabula more distinct, the obturator foramen 

 narrower, and the scapula more massive and more expanded towards its tip. 



Measurements, 



Tenths. 



Breadth of posterior margin of sternum 7| 

 Breadth of anterior margin of sternum 5 

 Depth of keel ....... 3 



Length of head . . 13 J, 



Breadth of head ...... 6 



Length of pelvis . . . . . . 12 J 



Breadth of pelvis ...... 8 



Illustrations. 

 Jalatine bones, sternum,, pelvis, metatarsa, Plate XVII. fig. 1. 





Tenths. 



Length of humerus . . . 



. . 10 



Length of ulna ..... 



. . 12J 



Length of metacarpus , . 



. . 7 



Length of femur .... 



. .. 9 



Length of tibia 



. .13 



Length of metatarsus . . 



• • 10* 



Length of sternum . . . 



. . 10 



