COHN, ON NASSULA ELEGANS. 101 
transformed into innumerable swarm-spores, which are 
discharged through the neck-like process. The history of 
the development of these parasites has been cleared up in 
the course of last year, (1856), by the observations of A. 
Braun, Pringsheim, Naegeli, Klos, and Cienkowsky. And 
on this subject should be consulted the memoirs of Braun 
on Chytridium in the ‘Reports and Memoirs of the Berlin 
Academy’ for 1856, and of Cienkowsky on Rhizidium Conferve 
glomerate contained in the ‘ Botanische Zeitung’ for 1857. 

