bulbochjEtacea. 297 



is the same as tliafc of the ordinary cells. Zoospores exactly- 

 spherical, twice the diameter of the cells. The tube of the 

 thread very delicate and indistinct. 



Order XXVI. BULBOCHiETACE^. 



" Threads articulate, hranched; fertile iranchlets hulb-sJiaped, 

 surmounted ly a long, inarticulate, hair-liJee point. Endo- 

 chrome apparently impregnated hy bodies provided in little 

 antheridia seated on the wall of the fertile cells, dividing 

 at length into four ovate zoospores" — Berkeley. 



Genus CXXXI. OCHLOCH^TE. 



" Frond disciform, adpressed ; filaments cylindrical, ra- 

 diating from a central point, irregularly branched, consisting 

 of a single series of cells, each of which is produced above 

 into a rigid, inarticulate seta ; endochrome green. Truc- 

 tification unknown." {Harvey.') — OcHLOCHiETE, from the 

 Greek ochlos, a multitude, and chaite, a bristle. 



Ochloclisete hystrix. The porcupine Ochlochsete. 



Frond minute, disc-like, of irregular outline, and pale 

 green colour, hoary from the multitude of rigid setae with 

 which it is covered. 



