No. 2391. DESCRIPTIONS OF PLEISTOCENE VERTEBRATA—HAY. 609 



township 23 north, range 19 east, near Wenatchee, Chelan County, 

 Washington. An account of this find and the fossils themselves were 

 sent to Dr. Henry Gannett, of the United States Geological Survey, 

 by Mr. Fred G. Plummer. The correspondence is preserved in the 

 National Museum. Mr. Parrish was making an excavation into a 

 ridge to reach a perpendicular vein of travertine, in the search for 

 supposed onyx. At a depth of 16 feet from the surface he found the 

 bones. A geological section shows that at the top there was 1 foot 

 of recent soil. This was followed by a bed 15 feet thick composed of 

 angular and partly rounded bowlders, somewhat cemented together 

 by calcite. Below this was an old soil, 4 feet in thickness, and in this 

 were found the fossils. The soil was underlain by sandstone of un- 

 known thickness. 



Many of the bones are fragmentary and indeterminable even gener- 

 ically but the following list has been made out. 



LIST OF FOSSILS AS DETERMINED. 



Megdlonyx jeffersoniif Bison, species indeterminable. 



Equus niohrarensisf Marmota arrodens, new species. 



Odocoileus, species indeterminable. M. Jlaviventer. 



Sangamonaf species indetermi- Thomomys fuscus. 



nable. Lepus or Sylvilagus, species in- 

 Alces ? species indeterminable. determinable. 



There are too few species and their identification too uncertain to 

 justify one in fixing too exactly the age of the deposit. The presence 

 of Equus and of probably Sangamona appears to indicate a time not 

 later than the Sangamon interglacial. 



MEGALONYX JEFFERSONII? 



A tooth, a second or third molar, of a species of Megalonyx, prob- 

 ably M. jeffersonii (Cat. No. 2658), is in the collection. The frag- 

 ment is 42 mm. long; the greater diameter is 20.5 mm.; the shorter, 

 14 mm. A section of the tooth resembles most that presented by 

 Leidy. 7 



EQUUS NIOBRARENSIS? 



A species of horse is represented by two lower left true molars — the 

 first and the third (Cat. No. 10287). They are little worn. The 

 first molar has the grinding surface 27.5 mm. long and 17 mm. wide, 

 not including the cement. The third molar is 36 mm. long and 16 

 mm. wide in front. So far as the writer can see, these teeth are not 

 distinguishable from those of the type of Equus niobrarensis. 



i Smiths. Contr. Knowl., vol. 7, pi. 16, fig. 14. 



27177— 21— Proc.N.M.vol.59 39 



