904 INDEX. 



Page. 

 Yellowstone National Park, geographical work of the United States Geo- 

 logical Survey in 80 



Young, Clarence Bishop, death of 46 



Yucatan, collections from 25 



Z. 



Zeledon, J. C. , collections made by 26 



Zoology, bibliography of 649 



Report on , - 583 



Zufii, explorations in , 69 



o 



