LClosteHum acioulm-e. West. 2. Closterium linea, Perty. 3. Closterium Kutzingii. Breh.
( 4 Closterium subulatum. Breb. 5. Closterium lineatum. {Khr.) 6. Closterium intermedium. Ralfs.
\ Closterium Pritchardianum. Archer. 8. Closterium Ralfsii. {Breb.) 9. Penium spirostriolatum. Bar,
