TROGONID.E.] OSTEOLOGIA AVIUM. [CAPITONINJ3. 



Sternum broad ; fissures on the posterior margin very deep, extending for more than 

 half the length of the sternum ; the anterior edge, behind the junction of the coracoids, 

 very much prolonged ; lateral edges constricted behind the articulation of the ribs, which 

 is very far forwards ; keel very shallow ; inferior edge quite straight ; anterior edge also 

 straight, produced nearly to the end of the manubrial process. Pelvis with the ischium 

 slanting very much outwards, the line of demarcation along the junction of the ilium with 

 it nearly obliterated ; two spines are apparent on its posterior margin, one on its inner 

 edge, the other near the centre ; obturator foramen similar to the Picidce, but narrower ; 

 ischiadic foramen also smaller. 



Bibs narrow ; styliform process very broad ; coracoids longer than among the Picidce ; 

 furculum weak, the rami merely united by a ligament. Wing- and leg-bones similar to 

 the Picidce. 



Measurements. 



Tenths. 

 Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 8^ 



Tenths. 



Length of humerus . . . . . . 14 



Length of ulna 18 



Length of metacarpus 7 



Length of femur 13^- 



Length of tibia 22 



Length of metatarsus 12 



Length of sternum 14 



Depth of keel 3 



Length of head 30 



Breadth of head 12 



Length of pelvis 18 



Breadth of pelvis 10 



Illustrations. 

 Sternum, Plate VIII. fig. 3. | Palatine bones of M. virens, Plate XII. fig. 3. 



Megalaima, G. B. Gray. 

 Calva, Lafr. 

 This bird has been made into a genus under the name of Gymnobuceo ; its structure, 

 as also that of Bucconodon formosus, is precisely similar to that of Megalaima. 



Psilopogon, Milll. 



Pyrolophus, Mull. 

 Similar to Megalaima corvina except in measurements ; the ulna much longer in pro- 

 portion to the humerus than in that bird ; the anterior portion of the obturator foramen 

 nearly obliterated. 



Measurements. 



Tenths. 



Length of humerus 12 



Length of ulna 16 



Length of metacarpus 5 



46 



Tenths. 



Length of femur 13 



Length of tibia . , 21 



Length of metatarsus 11 



