22 TUFTS COLLEGE STUDIES, VOL. IV, No. 7 



Page 130, after description of CHLAMYDOMONAS NIVALIS, 

 add, 



6. C. MONADINA Stein. 1878, Vol. Ill, PI. XV, figs. 38-39; 

 Wille, 1903, p. 144. PI. IV, fig. 19. Cell subglobose, 14-26 /* 

 diatn., cilia 2, about as long as the cell ; 2 pulsating vacuoles 

 at anterior end ; stigma elongate, near anterior end ; chromato- 

 phore cup-shaped, posteriorly thickened, with one pyrenoid. 

 Greenland, P. Richter, as C. Braunii. Europe. 



CRYPTOGLENA Ehrenberg, 1832, p. 150. 



Cells ellipsoid to ovoid, with thin wall and 2 cilia, with several 

 disk-shape blue-green chromatophores ; reproduction by re- 

 peated division of cells that have lost their cilia. 



C. AMERICANA B. M. Davis, 1894, p. 96, PI. XI. Motile 

 cells ellipsoid, 8-10 X 5-6 p. ; stigma single or double ; motion- 

 less cells 7-9 X 6-7 ft. Fig. 3. Mass., Bermuda. 



Like Glocochaete and Glaucocyslis this genus has often been 

 placed among the Myxophyceae on account of the color, but all 

 other characters indicate the Chlorophyceae. 



PYRAMIMONAS Schmarda, 1850, p. 9. 



Cells obconical, with 4 longitudinal ribs, with no definite cell 

 wall ; chromatophore cup-shape, lobed, with stigma, and with 

 pyrenoid at base ; cilia 4, equal ; reproduction by successive 

 longitudinal divisions. 



P. TETRARHYNCHUS Schmarda, 1850, p. 9, PI. Ill, figs. 1-8. 

 Fig. 4. Madison, Wis., G. M. Smith. l-'.tirope. 



SPONDYLOMORUM Khrenberg, 1848, p. 236. 



Colony of 16 cells, loosely attached in 4 alternating whorls of 

 4 cells each; cells obovoid, with membrane forming a papilla 

 at the smaller end of the cell ; each cell with 4 cilia at tin- 

 larger end, and with pyrenoid and stigma. Asexual reproduc- 

 tion by the formation of a i6-celled colony in each mother cell. 



Only one species. 



S. QUATERNARIUM Khrenberg, 1848, p. 236. Cells 5-15 \L 

 diam. ; colony 36-75 n diam. Fig. 5. Conn., Ohio, Cal. Eurof>c. 



Page >34> aft* 1 * KUDORINA KLEGANS, add, 



BESSBYOSPHABRA Shaw, 1916, p. 254. 



Colonies spherical, containing biciliate cells in a single layer 

 near the surface of the colony ; vegetative and gonidial cells 

 intermingled, unconnected ; gonidial cells developing asexually 

 to form new colonies ; sexual reproduction unknown. 



