EXPLORATION IX ALASKA IN IO.O7 GIL. VI ORE 35 



Ovibos; facial part of skull nearly as wide as cranial ; basioccipital 

 without a high median ridge ; teeth very large and relatively broad ; 

 m 1 and m 2 quadrate in transverse view." 



Specific characters. — "Size smaller than in S. cavifrons 

 (Leidy) ; horn cores much smaller and shorter; exostosis less exten- 

 sive, but more deeply excavated ; depth of brain case and surmount- 

 ing bony mass decidedly less." 



Remarks. — The only reported occurrence of this species in Alaska 

 is a horn core. No. 2378, U. S. National Museum, presented by Rev. 

 J. W. Chapman through Dr. Arthur Hollick. The label with the 

 horn gives the locality as Anvik, on the Yukon River, but it is un- 

 likely the specimen was collected in the immediate vicinity of that 

 place. It is more probable that it comes from some of the silt de- 

 posits along the Yukon twenty-five or thirty miles above Anvik. 



SYMBOS CAVIFRONS (Leidy) 



Hay 1 cites the occurrence of Or cavifrons in Alaska, due to the 

 fact that he includes Richardson's indeterminate species, Ovibos 

 maximus, under this head. 



This species, therefore, is not known to occur in Alaska. 



OVIBOS MAXIMUS Richardson 



Ovibos maximus Richardson, Zool. Voy. of H. M. S. Herald, 1852-54, 

 pp. 25-28, pi. xi, figs. 2, 3, and 4. 



Type. — An imperfect cervical vertebra, the axis or dentata (No. 

 9 -£, Haslar Museum), from Eschscholtz Bay, Alaska. 



Remarks. — From the very fragmentary nature of the type this 

 species appears indeterminable. 



OVIBOS MOSCHATUS (?) Zimmerman 



This is a recent species found at present in northern North Amer- 

 ica and Greenland. At present this animal is not known to range 

 west of the McKenzie River, but Pleistocene remains which have not 

 been distinguished from this species are found in Alaska. As in the 

 case of other remains referred to living species, more complete ma- 

 terial may show an extinct species separable from the living form. 



This appears more probable since a skull, collected by the writer 

 at the Palisades, on the Yukon, in 1907, is being described by Mr. 

 J. W. Gidley as the type of a new species, and it may be that all the 

 remains formerly considered O. moschahts should be referred to this 

 species. 



1 Hay, O. P. : Bulletin No. 179, U. S. Geological Survey, p. 688. 

 ~ Osgood now includes Ovibos cavifrons under Symbos. 



