TtJR»lDJ3.] 



OSTEOLOGIA AVIUM. 



[FoRMICARINjE. 



Measurements. 



Tenths. 



Length of humerus , . , . . 12 



Length of ulna 14 



Length of metacarpus 6 



Length of femur 13 



Length of tibia ....... 18 



Length of metatarsus 13 



Length of sternum ..... 1 1 



Tenths. 



Breadth of posterior margin of sternum 6 

 Breadth of anterior margin of sternum 6 



Depth of keel 2 



Length of head 20 



Breadth of head 9 



Length of pelvis 13 



Breadth of pelvis 9 J 



Myophonus, Temvn. 



Cyaneus, Horsf. 



Cranium with the vertex moderately convex; orbital septum nearly obliterated. 

 Palatine bones similar to Tardus ; upper edges of the orbits recurved. 



Pelvis rather narrow, much more so in proportion than in Turdus; obturator 

 foramen large ; ischiadic foramen almost obliterated. 



Sternum with the hinder margin nearly straight ; a large fissure on each side on the 

 posterior margin ; keel shallow. 



Ulna much longer than the humerus. 



Metatarsi long. 



Length of humerus 

 Length of ulna . . 

 Length of metacarpus 

 Length of femur 

 Length of tibia > . 

 Length of metatarsus 

 Length of sternum * 



Measurements. 



Tenths. 



H 

 Uh 



6 

 11| 

 20 



18 

 11 



Tenths. 



Breadth of posterior margin of sternum 8| 

 Breadth of anterior margin of sternum 7 



Depth of keel . 2 



Length of head . . 21 



Breadth of head 8 



Length of pelvis ...... 15 



Breadth of pelvis 10 



G&AkLlSrA, Vieill. 



Imperator, Natt 

 Very similar to Myophonus, but differs in having very large fissures on the posterior 

 margin of sternum, which is very slightly rounded ; the process at the junction of the 

 branches of the furculum is broad, flattened, and points downwards* while in Turdus it 

 points backwards. The leg-bones are very long, the wings short* the ulna only being 

 slightly longer than the humerus, 



is* 



