Strigidje.] osteologia avium. [Bubonic. 



Bubo, Sibb. 



Coromandus, Lath. 



The bones of the body of this bird are in the British Museum ; they are similar to 

 those of Bubo bengalends. 



Ketupa, Less. 



Javensis, Less. 



Cranium like that of Nyctea nivea ; orbital septa with a large perpendicular foramen. 

 Palatine bones with the hinder exterior angles produced to a point. Interarticular 

 bones with a central process, which does not quite reach the sphenoid. 



Sternum narrower posteriorly than anteriorly, indented on each side of the keel, with 



two fissures, the exterior one larger ; manubrial process well developed. The anterior 



edge of the keel receding. Pelvis as broad anteriorly as posteriorly. Coracoids long ; 



hinder metacarpal bone much arched and flattened for its whole length. Calcaneal 



process large, narrow, a ridge continued from it down the whole length of the entometa- 



carpal bone. 



Measurements. 



Tenths. 



Length of humerus 48 



Length of ulna 52 



Length of radius 50 



Length of metacarpus 20 



Length of femur 30 



Length of tibia 49 



Length of metatarsus 28 



Length of sternum 27 



Tenths. 

 Breadth of posterior margin of sternum 17£ 

 Breadth of anterior margin of sternum 16 



Depth of keel 5 



Length of head 34 



Breadth of head . , 24 



Length of pelvis 33 



Breadth of pelvis 14 



Illustrations. 

 Sternum, Plate IV. fig. 3. | Skeleton, Plate IV. A. 



Ephialtes, Keys & Bl. 



Lempiji, Horsf. 



All the bones I have of this bird were taken from a skin. 



Crown of the head very much arched down to the nasal bones, and laterally flattened 

 immediately above them. Orbital septum entire ; interarticular bones long, articulated 

 in their centre by a projecting process to the sphenoid. Palatine bones produced into 

 a bony spine at their posterior angle. Metatarsi similar to those of Nyctea nivea. 



Ephialtes, Keys & Bl. 



Grammicus, Gosse. 

 I have only the sternum of this bird, which is very broad in proportion to its length, 



