70] 



The Classification of Lower Organisms 



Fig. 12. — Hyphochytrialea: a-e^ Anisolpidium Ectocarpii; a-c, individuals de- 

 veloping in cells of Ectocarpus; d, mitotic figures x 2,000; e^ cell of Ectocarpus filled 

 by a mature individual discharging spores, f, g, Rhizidiomyccs apuphysatus; f, zoo- 

 spore; g, oogonium of Achlya parasitized by three individuals, h, i, j^ llyphochy- 

 trium catenoides; h, zoospore; i, young individual; j, mature individual with fila- 

 ments, sporangia, and zoospores in various stages of development. All after Karling 

 (1943, 1944, 1939). x 1,000 except as noted. 



