306 



OSTEOLOCV OP TUBINA.RES AND STEGANOPODES. 



but this is gradually exchanged for the subtribedral as we pass over tho 

 proximal balf of the bone. 



It presents for examination a double row of feebly marked papillae 

 for the quill-butts of the secondary feathers. 



Fig. 3 7 . 



Various bones of Sula Fi om the same specimen as shown in Fii:s. 24 et seq. .• all life size. By 



the author. 

 Fig. '.:3. The furcula, rotated outw arJ, so as lo sbovi fac< ts of articulation for beads <>l coracoids. 

 Fig. 34. Right coracoid, anterior aBpeot. 

 Fig. :;."'. Right scapula, outer aspect. 

 Fig. 36. Anterior aspect of right tarsometatarsal bono. 

 Fig. TJ7. Right lateral \i-u ofpygostyle, togctbi r with last coccygeal vertebra. 



A long, shallow, though notable, fossa is seen at the proximal and 

 anconal side of the shaft, which terminates just beyond the prominent 

 cup-shaped articulation for the ulnar tubercle of humerus in a single 

 pneumatic for&men, [fhissfosga has all the appearance ofb^wg intended 



