The . 1 in* nat n CreOlOQ'tst. 



April, lWfi 



f anemia t than the relative breadths of the two specimens would 

 indicate. One of the first phalanges 1ms a length of 1.6 inches, 

 a breadth proximally of 1.7."> inch, and distally of 1.5 inch. The 

 other, represented by the proximal half only, has a maximum 

 breadth of fully 2.13 inches. These phalanges are not stout 

 throughout, but expand somewhat suddenly from a comparatively 

 narrow cylindrical shaft to the upper extremity. 



The volcanic ash-beds which have yielded the type of AucJienia 

 liucrfanenais are regarded by Mr. Hills a* Pliocene. Teeth of 

 Emms', too much worn to admit of identification, occur in the 

 same deposits, which in all probability represent the "EqilUS 



beds." But whether all of the so-called "Equusbeds" belong in 

 reality to one epoch, is a matter still to be determined. 



In his monumental work on Lake Bonneville,* Prof. Gcilberl has 

 produced evidence which seems to definitely establish the fact 

 thai some of the "Equus bed*" are Quaternary. On the other 

 hand, Mr. Hills finds the ash -ieds of the upper Huerfano drain- 

 age overlaid with a conglomerate which he provisionally believes 

 to lie identical with conglomerates not far distant, and which are 

 overlaid by true morainal deposits. 



The results of further field work, which Mr. Hills hopes to 



prosecute in quest of the solution of the age of the Huerfano 

 volcanic ash-beds, will be awaited with interest by all students of 

 stratigraphic geology. 



*Mom>gniph I, V. S. Geological Survey, 18t»0, chapters vi and ix. 



