270 TUFTS COLLEGE STUDIES, VOL. II, No. 3 



veg. cell, 14-17 M diaru., 2-5 diarn. long, 



oog., 36-43 M " 29-36 M long, 



andr. cell, 10-12 /j. " 9-12 n " 



nan., 9-10 M " 23-25 M " 



Greenland, Conn., Alaska. Europe, Australia. 



5. B. POLYANDRIA Cleve in Wittrock, 1870, p. 140; Wolle, 

 1887, p. 98, PI. LXXXIX, figs. 6-9; Him, 1900, p. 334, PL 

 LIV, fig. 342. Dioecious, nannandrous, idioandrosporous; 

 oogonia subdepressed-globose, patent, under terminal setae or 

 vegetative cells ; dissepiment of suffultory cells superior, more 

 rarely submedian ; epispore of oospore finely pitted or nearly 

 smooth ; androsporangia lo-celled ; dwarf males on oogoniuni ; 

 autheridium interior, stipe slightly curved, shorter than the 

 antheridium. 



veg. cell, 15-20 M diaru., 3-5 diam. long, 



oog., 39-46 fj. " 32-42 M long, 



audr. cell, 12-14 M " n-^SM '' 



nan., 8-9 M " 23-26 M " 



Fla. Europe, So. America. 



6. B. DISPAR Wittrock in Wittr. and Nordst., Alg. Exsicc., 

 No. 401 ; Him, 1900, p. 335, PI. LIV, fig. 334. Dioecious, 

 nannandrous, gynandrosporous or idioandrosporous ; oogoniuni 

 large, subdepressed-globose, patent, under terminal setae, or 

 more rarely under vegetative cells ; dissepiment of suffultory 

 cells superior, more rarely sub-median ; membrane of oospore 

 thick, epispore manifestly finely pitted ; androsporangia scat- 

 tered, i-2-?-celled ; dwarf males on oogoniuni ; antheridium in- 

 terior, stipe slightly curved, shorter than the antheridium. 



veg. cell, 16-21 M diatu., 2-4j< diam. long, 



oog., 44-56 /j. " 42-51 /ulong. 



andr. cell, 12-16 /j. " 10-12 M " 



nan., 9-11 M " 23-36 /x " 



Greenland. Sweden, 



7. B. ANGULOSA Wittrock and Lund in Wittrock, 1874, p. 

 45 ; Hirn, 1900, p. 336, PI. LIV, fig. 346 ; B. elachistandra 

 Wolle, 1887, p. 97, PL LXXXXVL fig- 5- Dioecious, nan- 

 nandrous, gynandr.osporous ; oogonia patent, biconic- or sub- 

 quadrangular-globose, with truncate apex, sides of cone some- 

 what retuse, below terminal setae, or more rarely below andro- 

 sporangia ; dissepiment of suffultory cells a little above median ; 

 membrane of oospore smooth ; androsporangia scattered or epi- 

 gynous, i-3-celled ; dwarf males on oogoniuni, antheridium 

 interior, stipe slightly curved, shorter than the antheridium. 



