362 Annals of the Carnegie Museum. 



Ulna and radius present notliing peculiar beyond their size, being 

 smaller than any bones of the antibrachium that I have ever exam- 

 ined belonging to a typical Pnffiuiis (PI. XXIV, figs. 44 and 45). 

 The ulna, as in the case of the humerus, exhibits some slight lateral 

 compression, such as we find in other Shearwaters of existing avi- 

 faunc-e. The radius has a length of 5.4 cms. and is nearly straight. ^^ 



Bones of the carpus {radialc and tduarc) do not occur among the 

 subfossil bones in these collections; they doubtless would be almost 

 identical with those elements Ss we find them in the wrist of any 

 small, typical Shearwater of the genus Puffin ns. 



Carpometacarpus is straight and possesses a length of 3.3 cms. 

 (PI. XXVI, fig. 67), while that bone in Audubon's Shearwater has a 

 length of 3.6 cms. (PI. XXVI, figs. 76, yy). There is a specimen of 

 an imperfect carpometacarpus of Puffinns parius in the American 

 Museum collection, which has a length of but 3 cms., but it belonged 

 to a subadult individual, and plainly shows the divisional lines of the 

 added elements at its proximal end. 



Proximal phalanx of index digit of this extinct species of Shear- 

 water (fig. 74) agrees better in the matter of form with that bone of 

 the skeleton in some of the larger Shearwaters than it does with that 

 of P. Iherminicri, though only in the matter of being very slightly 

 wider for its length (figs. 71-73). In other respects it agrees in its 

 morphology with that segment of the hand in Puffincr generally. 



There may be some terminal finger joints of Puffinns parvus in 

 these collections, but they may have belonged to female or subadult 

 specimens of the " Cahow '" ; so I pass them by. The lists show that 

 a considerable numlier of these bones are present. 



Upon comparing all the bones of nianus shown in Plate XXVI. 

 figs. 65-67, yi-yy, and 80-84, one can gain a very correct idea of the 

 size and characters of that part of the skeleton in P. parvus as com- 

 pared with the corresponding parts in other Shearwaters of various 

 sizes; such comparisons render it quite unnecessary for me to enter 

 upon minutire in the matter of character descriptions of the hand- 



11 Some of the bones on the plates may run somewhat longer or be other- 

 wise larger than is stated in the text. This may be due to my having made 

 them so with the camera and the engravers reproducing them exactly, or to 

 the engravers not getting them the same size as the originals ; in any event 

 the sizes and lengths as given in the text are to be relied upon. 



