224 Annals of the Carnegik Museum. 



humeral head and the i)rominent projection of the ulnar tuberosity, is 

 deep, as is also the incisura capitis. At the distal end of the bone 

 both the trochlea radialis and ulnaris are large, the large fossa above 

 them being well scooped out. A low ectepicondylar process is devel- 

 oped. On the anconal side of this end of the humerus we find the 

 usual grooves for the guidance of passing tendons, the su/ciis anconei 

 lateralis being the best marked. 



Passing to the ulna we are to note that its stout, subcylindrical shaft 

 is but slightly curved, while down its palmar edge there can be counted 

 fourteen papillae indicating so many points of insertion of the sec- 

 ondary quill-butts of the feathers of the wing. At the proximal end 

 a good-sized olecranon process is seen, being situated directly over the 

 fossa of articulation of the trochlea ulnaris of the humerus. 



As to the radius, when the bones of the forearm are articulated in 

 situ, it projects, distally, somewhat beyond the end of the ulna, which 

 it there accurately overlaps. The reverse of this is the case at the 

 proximal ends. Again, the distal moiety of the radial shaft is nearly 

 straight, and runs parallel with the shaft of ulna, while the proximal 

 half of the radius is somewhat curved, its concavity facing the other 

 bone of the antibrachium, or the ulna. The shafts of these two ele- 

 ments of the forearm come in contact then only at their extremities, 

 thus creating an elongated interosseous space, which is of greatest 

 width proximad. Two free carpal bones are present, having the usual 

 ornithic characters. This latter remark might also be applied to the 

 carpo-metacarpus. Regarding it, however, we would say that its main 

 shaft (index metacarpal) is very straight, and has a calibre about one- 

 third greater than that of the middle third of the shaft of the radius. 

 Its curved medial metacarpal is far slenderer, and stands well away 

 along its continuity from the main shaft. Proximad, where it fuses 

 with it, it is considerably expanded from side to side, while distally, 

 where it joins the index metacarpal again, it is seen to be not quite as 

 long as the latter. Pollex- metacarpal is very short and projecting. 

 The articular surfaces of all the bones entering into the composition 

 of the carpus are as we find them in birds generally, that is, of the 

 ordinary species. 



The proximal phalanx of index digit is rather elongate with its ex- 

 panded part not markedly developed. This latter part has a small, 

 distinct process distally which projects beyond the true shaft-part of 

 the bone. It also has, on its palmar surface, an oblique ridge, divid- 



