■_ -■ _ 



■ ^, 



J - f 



» * 





\ ^ 



99 



Mlf^S E. M- BRISTOL ON 



zoogonidia formed by successive bipartition of: the o;reen protoplasm, \vhicli 



L 



rounds itself off into ii central mass, the rest of the cell-cavity l)(*ing filled 

 with a red granular sub^^tance ; zoooonidia asexual, biciliate^ spindle-shaped, 

 set fr.'c separately through .a hole in the zoogouidangium-\valL 



JJab. Endophytic in Lemna trisulca and Jfypmnn species, or growing in a 

 stratum formed by Pliornndmm species on soil. 



IV. (J, FACCIOLAiE (Borz'l), Bristol 



Kentroqilnera FacdoJace^ Borzi, 



ogici, Fuse* i. }»}). 87-1)7, 



including Chlorochj/trinnt glo'ophihnn^ Bohlin] . 



Keidvosplucva Faccwlate^ ]5orzi, Studi Algol 

 tab. 7. f. 1-13 (Messina, 188;i) ; Hansglrg, Frodr. p. 121, t. 71, 1888 ; 

 Boldin, K , " Die Algen dor ersteu Itegncdr^schen Expedition,'' Bihang 



till K. Svenska Yet.-iikad. HandHngar, Bd, 23, Afd, iii. no. 7, 181)7, p. 28, 

 tab. 1. f, 53-54; Moore, (r. T., Annals of Missouri Bot. Garden^ iv. pp. 271- 



278, Sept. 11)17. 



KenfrospJucra Fasciolaae^ Wille, NatLirlichen Pflan/onfamilien, i. Abt. 2, 

 Nachtriige, 1901"), p. 43, t 21, a-c ; 



Vegetative cells globose, sliortly ellipsoid or irregular, 26-42 /^ broad; 



r 



cell- wall firm and thin; chloroi)lnst probabl}^ as in C. parado^vinn with a 

 single superficial pyi'onoid ; hiematochrome often present. Pro^^agation. by 

 aplanospores from vegeiative cells, set free by disintegration of cell-Avall, or 

 by zoogonidia from cells that have been converted into TToogonidangia, both 

 kinds of spores being produced b^^ free cell-forjuation. Zoogonitlangia up 

 to 80^ in diameter ; wall much thickened, with 1-3 small, conical, internal, 

 cellulostt projections and a single, largo, striated oCLcn curved external, 

 callous ])rojection ; zoogonidia biciliate, asexual set free separately throTigh 

 a pore in the zoogonidangium-wall. Both kinds of spores develop directly 

 into vegetative cells, 



IJah. Among filaments of freshwater Oscillatoriacca3 and of marine 

 Cladophora, 



Var. MiKoit (Borzi), nob. 



Kentrosplucra )nhio}\ Borzi, Studi Algologicij Fasc, \. pj). 87-1)7, tab. 7. 

 f. 14-19 ; Hansgirg, Prodr. p, 121, 18b8. 



Structirre and life-hisfory as in normal form, but zoogonidangia at most only 

 10-'12/x l)road and up to 35 /t long; zoogonidia few, 8-32 only from one cell. 



Hub. In 



stagnant deep sea -water associated witli Osctilaioria luno^a 



3 



Cladophuru fradUj and Gongrosira De Barija)ta, 



V. C. GRANDE, Bristol in Ann. Bot. vol. xxxi. (1917) pp. 107-12fi, pis. 

 5& 6. 



Vegetative cells spherical, subspherical, or ellipsoid, G5-75yct broad; wall 

 firm and thin ; chloroplast single, massive^ with central axis surrounding the 

 large nucleus and much-branched arms extending to the surface and giving 

 the cell a mulberry-like appearance; a variable number of pyrenoids, starch 



