Certhiad^:.] 



OSTEOLOGIA AVIUM. 



[Dendrocolaptin^e. 



Dendrocolaptes, Herm. 



Platyrostris, Spix. 



Cranium much rounded from the vertex to the occiput; occipital ridge very 

 apparent ; channel for the masseter muscles very distinct ; occipital protuberance also 

 well marked, from which a slight channel proceeds over the vertex to the transverse 

 channel between the nasal bones, which is deep. Space between the orbits moderate ; 

 orbits large, margin not reflected; septum entire. Palatine bones and interartieular 

 as in Troglodytes. 



Sternum similar to Troglodytes with the exception of having a very well-defined 

 manubrial process, and the plane of the sternum nearly flat, and near its hinder margin 

 concave ; keel with the inferior margin nearly straight. 



Pelvis similar to Troglodytes, but with the anterior portion of the iliac bones rather 

 more divided. 



Rils similar to Troglodytes. 



Furculum arched, the branches flattened laterally, a slight process turning back- 

 wards at their junction with the sternum. 



Coracoids similar to Troglodytes. 



Scapula not so long in proportion to the humerus, they being of nearly equal length, 

 and curving so much downwards. 



Wing-bones of moderate strength, the bones forming the metacarpus not 

 united. 



Femur nearly straight ; fibula more than half the length of the tibia. 



Vertebral column of moderate strength, the penultimate and three next vertebra? 

 with dorsal processes, the terminal caudal one large, triangular. 



Measurements. 



Length of humerus 

 Length of ulna . . 

 Length of metacarpus 

 Length of femur 

 Length of tibia . . , 

 Length of metatarsus 

 Length of sternum 



Tenths. 

 11 



14 

 7 

 10J 

 15 

 11 

 11 



Tenths. 



Breadth of posterior margin of sternum 8 



Breadth of anterior margin of sternum 61 



Depth of keel 3 



Length of head 25 



Breadth of head 8 



Length of pelvis 15 



Breadth of pelvis 10 



Picolaptes, Less. 



Tenuirostris, Licht. 



Precisely similar to the preceding, except in measurements, and in having the 

 scapula rather longer in proportion to the humerus. 



101 



