Teogonid^e.J osteologia avium. [Trogoninjl 



bones not so much arched ; the space between the orbits above narrower ; upper edges 

 of the orbits much reflexed ; a depression from the base of the nasal bones over the 

 vertex well denned ; occipital ridge scarcely perceptible ; the masseter impression deep, 

 but not extending backwards to the occiput, as in Podargus. Orbital septum as in 

 Podargus. Upper maxillaries covering the roof of the mouth for one-fourth of their 

 length. Palatine bones narrow anteriorly, slightly expanded at their junction with the 

 maxillaries, posteriorly with the interior edges much derlexed, not united, except at 

 their articulation with the interarticular bones, which have a process in the middle 

 uniting with the base of the sphenoid, which is extremely rudimentary, and does not 

 expand as far as the os quadratum. A deep, transverse, and horizontally arcuated de- 

 pression at the base of the nasal bones ; nostrils very slightly oval, placed nearly hori- 

 zontally, with a ridge between them. Lacrymal bones wanting. 



Sternum with the posterior margin considerably broader than the anteritfr, indented 

 on each side with two deep fissures, the strip of bone bounding the external fissure on 

 each expanded at the tip, thus partially enclosing the fissure ; the lateral margins of the 

 sternum much constricted in the centre behind the ribs, convex longitudinally and trans- 

 versely ; keel with its lower edge slightly arched ; the anterior edge much excavated, 

 not receding. Manubrial process laterally flattened, widest at its extremity. 



Pelvis very wide and short ; a knob on the posterior margin where the ischium and 

 ilium unite ; the ilium does not overhang the ischium, which starts outward from the 

 plane of the former bone. 



Coraeoids rather long, very broad at their articulation with the sternum. 



Bami of the furculum long, slightly arched. 



Bibs weak, expanded for their upper halves ; styliform process long, narrow. 



Pelvis very broad and short, the ischium starting very much obliquely outwards to 

 the os pubis. Ischiadic foramen very large ; obturator small ; fibula extending down- 

 wards only one-fourth the length of the tibia, and anchylosed to it at both ends. 



The remaining bones similar to those of Podargus. 



Measurements. 



Tenths. 



Length of humerus 13^ 



Length of ulna 14^ 



Length of radius 14 



Length of metacarpus §\ 



Length of femur 9^- 



Length of tibia . 12 



Length of metatarsus 6-^ 



Length of sternum 12 



Illustrations. 

 Sternum, Plate VIII. fig. 2. | Palatine bones, Plate XII. fig. 2, 



44 



Tenths. 

 Breadth of posterior margin of sternum 11^ 

 Breadth of anterior margin of sternum 8 



Depth of keel 4 



Length of head 18 



Breadth of head 10 



Length of pelvis 14 



Breadth of pelvis H 



