Trogonid^e.] 



OSTEOLOGIA AVIUM. 



[EURYLAIMJE. 



Subfam. 3. Eurylaim^e. 



Eurylaimus, Horsf. 



Sumatranus, Raff. 



Type of Eurylaimse. 



Cranium similar to Trogon, but with a slight ridge in the centre of the depression 

 between the upper edges of the orbits, the depression extending to the vertex ; the mus- 

 cular impression of the masseters very deep and broad, but not continued so far back- 

 wards or so deep as in Podargus. Maxillary bones covering the roof of the mouth for 

 one-third of the length of the head. Palatine bones consisting for their anterior two- 

 thirds of a narrow strip, at which point a rounded process projects from the external 

 edge, and another narrow strip is thrown off from the internal edge, uniting with a 

 dependent lamina, which is carried backwards and articulated with the interarticular 

 bone and the vomer. Interarticular bones straight, rounded, very slightly expanded at 

 their junction with the palatine. Sphenoid as in Podargus. Orbital septum with a 

 foramen on the upper edge. A very strong arcuated depression at the base of the nasal 

 bones, from which extends a strongly defined ridge over the culmen of the bill. Nasal 

 orifices large, somewhat triangular, with the base of the triangle placed backwards. 

 Orbits slightly reflexed. 



Sternum longer in proportion to its breadth than in Trogon or Podargus, posteriorly 

 with a lateral foramen on each side, narrowest anteriorly, and constricted behind the 

 junction of the ribs ; keel of moderate depth, inferior edge very slightly arched, anterior 

 much excavated ; manubrial process very long and horizontally flattened. Ribs weak ; 

 styliform process long. 



Pelvis with the bones of the ilium not so broad as in Trogon, but more resembling 

 Podargus. A spinous process extends far backwards on each side of the sacral vertebrae. 

 Ischiadic and obturator foramina very large. Furculum arched; a perpendicularly 

 flattened process at the junction of the rami. The remaining bones similar to Trogon. 



Measurements. 



Tenths. 



Length of humerus 13| 



Length of ulna 18 



Length of radius 17 



Length of metacarpus 7-| 



Length of femur 17 



Length of tibia 18 



Length of metatarsus 10 



Length of sternum 13|- 



Tenths. 

 Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 8 



Depth of keel 4 



Length of head ....... 22 



Breadth of head 11 



Length of pelvis 16 



Breadth of pelvis 10 



Illustrations. 



Skeleton, Plate VIII. B. 

 Sternum, Plate VIII. fig. 5. 



Palatine bones, Plate XII. fig. 5. 



49 



