. The phytoplankton of some subarctic lakes in Finnish Lapland. Fauna Brabet, Gonyostomum semen (Raphidophycées), nuisance. «The phytoplankton of sorne subarctic lakes in Finnish Lapland». Soc. Mem. BRABET, «Gonyostomum semen (Raphydophycées), nui- sance potentielle des grands.