VOL. IV. 



NO. 9. 



JULY, 1898. 



u±v?\ 



A Journal Devoted to Research in Natural Science. 



RA TES: — j^o cts. per year to all countries, in advance. Single numbers, 5 cts. 



i 



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



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