Scanning Electron Micrographs of Cyclotella (top left), Navicula (top right) Synedra (bottom left) and Diploneus (bottom right) from Algae Image Laboratory (Rex Lowe, Director) (www.bgsu.edu/departments/biology/facilities/algae_link.html). See the Scanning Electron Micrographs (Pages viewed 14 Apr. 2004)