THE AMERICAN 



MONTHLY 



Microscopical Journal 



CONTAINING 



CONTRIBUTIONS TO BIOLOGY. 



VoLaUMR XIV. 



FOR 



1893. 



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



PUBLISHED, SINCE1887, BY CHAS. W. SMILEY, 



WASHINGTON, D. 0. 



