(EDOGONIUM. 79 



OEDOGONIUM IRREGULARE, Wittr. 



Oogonia single, globose, opening by a pore above the mid- 

 dle, oospore filling the oogonium, dwarf males seated near 

 or on the oogonia, spermogonia 2-4 celled, terminal cells 

 attenuated. 



Diameter veg. cells, 16-20yw; 2 5 -4 times longer. 

 Diameter oogon., 37-45 yw by 36-43 /x 

 Diameter oospor. , 30-40 yw by 34-38 yw. 

 Diameter stipe dwarf males, 12-15 yw by 20-24 yw. 

 Diameter sperm, cells, 10-12 /u by 6-8 yw. 



Marshes, Florida. 

 Plate LXXVIII, figs. 4, 5. 



OEDOGONIUM BRAUNII, (Kg.) Pringsh. 



Gynandrosporous ; oogonia single, elliptic- globose, opens 

 by pore in the middle ; oospore globose, nearly filling the 

 oogonium ; androsporangia 1-2 celled ; dwarf males some- 

 what curved, seated near the oogonium, usually on the sup- 

 porting cell ; spermogonia unicellular. 



Diameter veg. cells, 13-15 yw ; 2-4 times longer. 

 Diameter oogon., 30-33 yu by 33-36 yw. 

 Diameter oospor., 27-29 yu by 27-29 yu. 

 Diameter androspr. cells, 14-15 yu by 11-12 yw. 

 Diameter dwarf male, 7 yw by 15 yu. 

 Diameter sperm, cells, 5 /* by 9 /^. 



Pennsylvania, New Jersey. 

 Plate LXXIX,.figs. 6, 7. 



OEDOGONIUM LUNDENSE, Wittr. 



Oogonia 2-4 seriate or single, subglobose, opening by an 

 operculuni, fissure very narrow and indistinct ; oospore glo- 

 bose, very nearly filling the oogonium ; terminal cell obtuse ; 

 dwarf males seated on the oogonia, stipe curved ; spermo- 

 gonia one-celled. 



Diameter veg. cells, 15-17 JJL ; 11-2J times longer. 

 Diameter oogon. , 32-34 /u by 34-35 //. 

 Diameter oospor. , 30-31 yu by 30-31 yu. 

 Diameter stipe dwarf males, 12 yu by 27-30 yw. 

 Diameter sperm, cells, 10 yw by 6-8 yu. 



Marsh pools, Eastern Pennsylvania. 



Plate LXXVII, figs. 9, 10. 



6 



