OSTEOLOGIA AVIUM. 



[Cacatuin^e. 



PSITTACIDJE.] 



Cacatua, Briss. 



Moluccensis, Cm. 

 Sternum rather shorter in proportion than in galerita, and the manubrial process 

 rather longer ; anterior edge of the keel not extending to the end of it. Cacatua sul- 

 phur ea and citrinocristata are similar to the above. All are in the British Museum. 



, Measurements. 



Tenths. 



Length of humerus . ...... 13 



Length of ulna 39 



Length of metacarpus 20 



Length of femur 24J 



Length of tibia 34 



Length of metatarsus 11 



Length of sternum 17 J 



Tenths. 

 Breadth of posterior margin of sternum 15 

 Breadth of anterior margin of sternu m 1 4 



Depth of keel 8 



Length of head 35 



Breadth of head 19 



Length of pelvis 35^ 



Breadth of pelvis 17 



Cacatua, Briss. 



Eos, Kuhl. 

 Similar to the preceding. 



Measurements. 



Tenths. 



Length of humerus 19 



Length of ulna 22 



Length of metacarpus 13 



Length of femur . 16 



Length of tibia ....... 23 



Length of metatarsus 7 



Length of sternum 19 



Tenths. 

 Breadth of posterior margin of sternum 11 

 Breadth of anterior margin of sternum 10 



Depth of keel 6 J 



Length of head 21 



Breadth of head 11-J- 



Length of pelvis 24 



Breadth of pelvis 11^ 



Calyptoehynchus, Vig. & fforsf. 

 Baudinii, Temm. 



Cranium of enormous size and strength ; the vertex not quite so flat as in Cacatua ; 

 the nasal bones much elevated above the frontal, forming a transverse ridge, highest in 

 the middle, the bill bending very abruptly downwards ; orbits entirely surrounded by 

 bone, as in Cacatua ; impression of the masseter muscles large ; hinder margin of 

 the inferior maxillaries truncate. Skeleton very strong. Remaining bones similar to 

 Cacatua. 



l2 71 



