62 R. W. Shujeldt 



when the femora are completely non-pneumatic; so it is just possible 

 that the pheasants of this country of Miocene time possessed pneu- 

 matic humeri and non-pneumatic femora, and that the pneumaticity 

 of the latter bones has been acquired since Miocene time; and for 

 causes entirely unknown to us, the genus long ago became extinct in 

 America. 



PuFFiNUS coNRADi Marsh. 



{Plate VIII, Figs. 63, 64.) 



Marsh, Amer. Joum. Sci., ser. 2, XLIX, 1870, 212. 



Holotype. No Cat. Number. Academy of Natural Sciences of Philadelphia. 

 Marjdand. Miocene. 



Specimen consists of nearly the distal half of a left humerus 

 (fossil) of a bird, and the distal third (or less) of the left ulna, appar- 

 ently coming from the same indi\idual. 



I have compared this specimen most carefully with the humeri of 

 many birds of many genera having the main characters which it 

 presents; for, be it known, the Puffins are not the only sea-birds which 

 possess a prominent ectocondyloid process on the radial side of the 

 humerus, with a deep excavation proximad to the articular tubercules, 

 as these characters exist in the humeri of auks, gulls, petrels and ful- 

 mars. (See Fig. 62, PI. VIII.) However, the determination of 

 Professor Marsh, with respect to Puffinis conradi, is probably as near 

 the truth as we can hope to get; for, as a matter of fact, if P. conradi 

 was not actually a Pufhn, it certainly was as near the representatives 

 of that genus as anything else. Personally, I am inclined to believe 

 that it was a true Pufhn. 



SULA ATLANTICA sp. nOV. 



{Plate XV, Fig. 123.) 



Holot>'pe. Cat. No. 937, Peabody Museum, Ya'e University. New Jersey. 

 Miocene. L. Leidy, collector. 



Up to the present time, in so far as I am aware, but few fossil 

 remains of Sididce have been described, and of these only one 

 for North America. ^ For the new species here established, there 

 exists in the collection of Yale University a fossil left coracoid of a 



^ Three extinct Gannets have been described from their fossil remains as having 

 been chscovered in France, one of these being from the Miocene and two from the 

 Lower Miocene; all have been referred to the genus Sula. 



The species that demands consideration here, however, is the Sula loxostyla of 

 Cope (Tr. Amer. Phil. Soc, XIV, 236, Fig. 53, 1870), which he "found at the foot of 

 the Miocene cliffs in Calvert Co., Maryland." In the place cited, Professor Cope 



