BULBOCHAETE. 99 



Plate LXXXVI, figs. 6 and 7 represent this form ; figs. 

 8-11, zoosporangia, and zoospores in different stages of exit. 



Plate LXXXIX, fig. 1, a specimen from New Jersey pine 

 barrens ; figs. 2, 3, var. Canbyii, Wood. 



BULBOCHzVETE BREBISSONII, Kg. 



Oogonia obcordiforni-globose ; truncate below, erect, seated 

 beneath terminal setae or androsporangia ; dissepiment of 

 supporting cell low ; epispore delicately crennlate ; andro- 

 sporangia 2-3 celled, scattered or epigynous ; dwarf males 

 seated on the oogonium or more rarely near it ; stems 

 straight, or nearly so. 



Diameter veg. cells, 17-20 ^ ; 3-42 times longer. 

 Diameter oogon., 42-50 ju. by 37-45 /*. 

 Diameter dwarf males, 10-12 /* by 28-33 /x 



A plant found in pond, Hammonton, New Jersey, is re- 

 ferred, with some hesitation, to this European species; it is 

 not strictly identical, but nearer it than any other species. 

 Fresh specimens are desirable for more definite determina- 

 tion. 



Plate LXXXVIII, fig. 1, a filament with oogonia, and 

 dwarf males. 



b. Basal cell of stem of dwarf males longer than the spermogonia. 



BULBOCHAETE GIGANTEA, Prillgsh. 



Idio-androsporous? oogonia rather depressed obcordate- 

 globose, seated beneath terminal setae, rarely beneath 

 vegetative cells ; dissepiment of supporting cell at or a little 

 above the middle ; epispore verm cose ; dwarf males a little 

 longer than the oogonium and seated upon it ; stem twice as 

 long as the spermogonium, arcuate. 



Diameter veg. cells, 24-27 ^ ; 2-3 times longer. 

 Diameter oogon., 62-66 ^ by 51-58 yu. 

 Diameter dwarf male stem, 11-12 /( by 40-45 yu. 

 Diameter sperm, cells, 13-14 ^ by 20-22 yw. 



Sluggish river water, Pennsylvania. 



Plate LXXXVII, fig. 1, branched filament with four 

 oogonia and one dwarf male, 



