524 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
(Treats in detail of the spore formation, germination, etc., of Tuburcinia 
Trientalis and in less detail of Sorosporium Saponariae , S. Junci, The- 
caphora hyalina, Entyloma Aschersonii, E. Magnusii, E. Eryngii , Mel- 
anotaenium endogenum; gives systematic arrangement of the genera of 
Ustilagineae.) 
