"^ 



JHE AMERICAN 



MONTHLY 



Microscopical Journal: 



/ CONTAINING 



CONTRIBUTIONS TO BIOLOGY 



VoLaUMB. XV. 



FOR 



1894. 



FOUNDED IN 1880, BY ROMYN HITCHCOCK, F, R. M . S. 



PUBLISHED, SINCE 1887, BY CHAS. W. SMILEY, 



WASHINGTON, D. C. 



