VOL. IV. 



NO. 7. 



MAY, i8g8. 



iEUTH 



A Journal Devoted to Research in Natural Science. 



RA TES: — jO its. per year to all countries, in advance. Single numbers, 5 cts. 



Published on the 1 5th of each month by Museum Publishing Co. .Albion, N. Y. 



