. Fresh-water biology. Freshwater biology. 146 (144, 145). Cells solitary, membrane with short spines or network. Trochiscia Kiitz. Cells perfectly spherical, the spines or reticulate markings project- ing but little. Chromatophores usually several. Reproduction by internal division. West also reports reproduction rarely by fission and by zoospores. The genus needs further investigation. Fig. 180. Trochiscia vestitus Reinsch. X about 260. (After Reinscb.) Cells solitary, bristles long, rigid, scattered over the entire surface Golenkinia Chodat. Reproduction occurs by division in one or two dir
. Fresh-water biology. Freshwater biology. 146 (144, 145). Cells solitary, membrane with short spines or network. Trochiscia Kiitz. Cells perfectly spherical, the spines or reticulate markings project- ing but little. Chromatophores usually several. Reproduction by internal division. West also reports reproduction rarely by fission and by zoospores. The genus needs further investigation. Fig. 180. Trochiscia vestitus Reinsch. X about 260. (After Reinscb.) Cells solitary, bristles long, rigid, scattered over the entire surface Golenkinia Chodat. Reproduction occurs by division in one or two directions and by autospores. Chodat also reports the formation of zoogonidia with four cilia. Golenkinia has been known to occur in great quantities almost pure in large tanks of water; it also occurs in the plankton, though not very abundantly. Chromatophore parietal, with one pyrenoid. Sir Ray Lancaster believes that his Archerinia boUoni de- scribed in 1885 and referred to the Protozoa is identical with Golenkinia. radiaia described by Chodat in 1894, and with Richteriella botryoides described by Lemmennann in 1898. If this be true the name Archerinia claims precedence over the other two generic names. Fig. 181. Golenkinia radiata Chodat. X 625. (Original.) Cells in colonies of eight, sixteen, thirty-two, sixty-four, or more cells; bristles long, only on the outer surface of a col- ony Richteriella Lemmermann. Bristles comparatively coarse and in length many times the diameter of the cells. Chromatophore single, parietal, with a single pyrenoid. The cells are usually clustered in groups of four which are aggregated into larger colonies. But little is known of its reproduction except that vegetative division has been known to occur. It is found in the plankton of large lakes. Fig. 182. Richteriella glohosa Lemmennaim. X 556. Lemmennann.) (After 147 (143) Cells somewhat elongated 148 148 (149, 150) Bristles four, two at each end or one at each end and two at the center, each wit
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