TAKE-OFF MECHANISMS IN CRYPTOGAMS ETC.
Spore- and pollen-liberation mechanisms have formed the subject of classical researches in biology for over a century. The wealth of informa- . tion in the scattered literature on land plants is reviewed by Ingold (199), and knowledge about bacteria by Wells (i955), but for protozoa and algae I know of no comprehensive treatment. In the present connec tion we are concerned with those aspects of the mechanism which deter mine when, and under what conditions, spores get into the air.