Certhiadje.] 



OSTEOLOGIA AVIUM. 



[FURNARIN.E. 



of moderate size ; orbits with their upper edges reflected ; septum with one very small 

 foramen ; nostrils oval. Palatine and interarticular bones wanting. 



Sternum of moderate size, indented posteriorly, with two wide fissures transversely 

 convex ; the lower edge of the keel slightly rounded, moderately deep, with a slight 

 manubrial process. 



Pelvis similar to Dendrocolaptes, but with the obturator foramen much larger. 



Ribs rather weak. 



Furculum long, without any process where it is united to the sternum ; very little 

 rounded anteriorly. 



Coracoids rather long, rounded in the middle. 



Scapula long, the tip much deflexed ; nearly as long as the humerus. 



Bones of the wing of moderate strength, the humerus bent, the ulna much shorter 

 than the humerus. 



Femur straight. 



Measurements. 



Tenths. 



Breadth of posterior margin of sternum 4 J 



Breadth of anterior margin of sternum 4 



Depth of keel ....... 2 



Length of head 13 J 



Breadth of head 5 



Length of pelvis 8 



Breadth of pelvis 6 



Tenths. 



Length of humerus ..... 7 



Length of ulna 9 



Length of metacarpus .... 4 \ 



Length of femur 6 J 



Length of tibia 9 



Length of metatarsus 7 



Length of sternum 7 



Sittella, Sw. 



Chrysoptera, Lath. 

 In every respect similar to Sitta. 



Furnarius, Vieill. 



Cunicularius (?) 

 Very similar to the other Certhiadce, but with the keel of the sternum much deeper ; 

 the process at the junction of the furcular branches larger and the pelyis broader in 

 proportion to its length. 



Measurements. 



Tenths. 



Length of humerus ..... 9 



Length of ulna 12J 



Length of metacarpus 8 



Length of femur ...... 7 



Tenths. 



Length of tibia ....... 1 1 



Length of metatarsus 10 



Length of sternum .... e 10 

 Breadth of posterior margin of sternum 6 



103 



