28 -COCCOPHYCES. 
cell, and as if on w common stipes, that is, as if all were ‘ in ramulis 
—gqnaternatim conjuncte.’” The larger lower cells are com- 
bined, inter se, by a soft irregular colourless furcated (almost as if 
shrivelled) stalk, into a crowded colony or family. This branched cluster 
of cells requires to be broken up and pressed out ere the arrangement 
referred to can be seen. The structure and mode of arrangement of the 
cells (which are bright green, with a pale narrow little space at the 
upper extremity, and with large chlorophyll granules) becomes thus of 
somewhat complex appearance, nor did it appear to have been made ont 
fully by Braun himself, as conveyed by his description.—See Quart. 
Journ. Micr, Science, 1872, pp. 195, 198. 
a 
Genus 21. MISCHOCOCCUS. Nig. (1849.) 
Thallus dichotomously branched, bearing the terminal cells. 
Cells globose, terminal, geminate or quaternate. Division of 
cells in one direction. Propagation by zoogonidia. 
This genus is confined at present to a single species, 
Mischococcus confervicola. Nig. Hinz. Alg. p. 82. 
Cells globose, even, geminate, ternate or quaternate, on the 
tips of the branches, bright green, delicately granular, destitute 
of a chlorophyllose vesicle ; stem hyaline, spuriously articulated, 
often swollen at the angles. 
SizE. Cells :0045--009 mm, (Rabdh.). 
Rabh. Alg. iii. p. 54, fig. 29. 
Attached to filamentous Alge in ditches, near Stafford, 
August, 1849 (Rev. R. C. Douglas). 
This interesting little plant is liable to be overlooked on account of its 
small size and the delicate hyaline stem, only the pair, or more, of little 
globose green cells being at first visible. 
Plate XI. fig. 4. a, two plants parasitic on Conferva; b, young 
plants; c, terminal branches with 4 cells; d, swollen joints of stem; e, 
free cells. All magnified 400 diam. 
