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



sepiment of suffultory cells submedian ; epispore of oospore 

 reticulately pitted; androsporangia i-5-celled; dwarf males 

 slightly longer than the oogonium, on the same ; antheridium 

 interior, stipe about twice as long as the antheridium, bent. 



veg. cell, 24-32 fj. diam., 2-3J4 diam. long, 



oog., 60-70 ,a " 50-58 /a loug. 



andr. cell, 18-20 /u, " 10-14 f- " 



nan. stipe, 10-13 M " 28-45 M. " 



anth. cell, 13-14/1* " 20-30 M " 



Pa. Europe, Australia. 



KLLIPSOSPORAE. 



11. B. MONILE Wittrock and Lund in Wittrock, 1874, p. 50; 

 Him, 1900, p. 348, PI. LVII, fig. 360; P. B.-A., No. 1432; 

 B. nana Wolle, 1887, p. 100, PI. LXXXVII, fig. 6. Monoe- 

 cious, generally few-celled, vegetative cells short, hardly as long 

 as broad, sides often convex, cells then submoniliform or sub- 

 globose ; oogonia ellipsoid, patent or more rarely erect, below 

 terminal setae or vegetative cells ; antheridia i-2-?-celled, erect 

 or patent, subepigynous or scattered. 



veg. cell, 11-16 /u. diam., i diam. long, 



oog., 22-25 n " 30-37 n loug. 



auth. cell, 8-10 M " 6 8 /a " 



Mass., N. J. Sweden. 



12. B. NANA Wittrock, i872a, p. 7, PI. I, fig. 9 ; Hirn, 1900, 

 p. 349, PI. LVII, fig. 362. Monoecious; oogonia ellipsoid, 

 patent, below terminal setae or vegetative cells; antheridia 1-2- 

 celled, erect, more rarely patent, subepigynous or scattered. 



veg. cell, 10-15 M diam., i-i> diam. long, 



oog., 20-25 M " 33-4 Mong. 



anth. cell, 7-9 M " 6-9 fj. " 



Greenland, Alaska. Europe. 



13. B. MIRABILIS Wittrock, 1870, p. 137, PI. I, figs. 8 and 

 9; Wolle, 1887, p. 100, PI. LXXXVII, figs. 2 and 3 ; Him, 

 1900, p. 351, PI. I, VIII, fig. 365; P. B.-A., No. 1431. Monoe- 

 cious ; oogonia ellipsoid or suboblong-ellipsoid, patent, or more 

 rarely erect, below terminal setae or vegetative cells ; anther- 

 idia i-4-celled, erect or patent, subepigynous or scattered. 



veg. cell, 15-20 M diam., i#-2 diam. long, 



oog., 26-33 n " 46-58 M long, 



anth. cell, 9-12 n " 6-9 n " 



Greenland, N. J., Minn. Europe, Australia. 



