70 R. W. Shufeldt 



BIRDS OF UNCERTAIN GEOLOGIC POSITION. 



COLINUS EATONI Sp. IIOV. 



(Plate XIII, Fig. 103.) 



Holotype. Cat. No. 949, Peabody Museum, Yale University. Kansas 

 (Shipped from Ft. Wallace). Geologic level unrecorded. 



I find in this collection, as set forth above, a perfect left carpo- 

 metacarpus, with the proximal phalanx of index digit. These bones 

 are thoroughly fossilized and perfect in every way. They are nearly 

 white, and show small, reddish spots of staining scattered here and 

 there. Some Httle distortion from pressure is e\ident in the larger 

 bone, but it is not very marked. 



They represent a Bob-white, of a species somewhat larger than 

 Colinus V. virginianiis and present similar osteological characters. 



I have pleasure in naming this new form for Dr. George Francis 

 Eaton, of Yale University, in recognition of his palaeontological work, 

 and particularly for his valuable contribution "Osteology of Ptera- 

 nodon," which has greatly furthered the accurate investigation and 

 elucidation of the Pterodactyls of the North American Cretaceous 

 Beds. 



Gavia pusillai sp. nov. 



{Plate XIII, Fig. 106.) 



Holotj-pe. Cat. No. 864, Peabody Museum, Yale University. ? Wyoming. 

 Geologic level unrecorded. J. B. Hatcher and party, collectors. 



Species based upon a fossil proximal extremity of a left cirpo- 

 metacarpus. It is in perfect condition, as far as it goes, and the re- 

 markable part of it is that, in nearly every particular, it agrees with 

 the part of the left carpo-metacarpus in Gavia hmner — the common 

 Loon. (PI. XIII, Fig. 105.) In the new. species, the head of the bone 

 projects more posteriorly; the supero-external angle of the coossified 

 metacarpal of pollex is more rounded off than in Gavia hmner, and that 

 part of the bone is comparatively broader. 



This fossil carpo-metacarpus came from the skeleton of an extinct 

 loonlet, about one-half the size of the existing Great Northern Diver 

 or Loon (G. immer), and from all indications sufficiently like it osteo- 

 logically to avoid the necessity of creating a new genus for it. 



^ Gen. name = L. Gavia, some kind of a bird. Spec, name = L. pusillus, 

 puerile (puer, a boy, hence small). 



