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



sepiment of suffultory cells submedian ; epispore of oospore 

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

 slightly longer than the oogoniura, on the same ; antheridium 

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



veg. cell, 24-32 p diam., 2-3' 2 diam. long, 



oog., 60-70 ,a " 50-58 M long, 



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



nan. stipe, 10-13 M " 2 -45 M " 



anth. cell, 13-14 M " 20-30 n " 



Pa. Europe, Australia. 



ELLIPSOSPORAE. 



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 /JL diam., r diam. long, 



oog., 22-25 M " 3-37 /" long, 



auth. cell, S-io M " 68 M " 



Mass., N. J. Sweden. 



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

 p. 349, PJ. 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 Mdiam., i-i/4 diam. long, 



oog., 20-25 M " 33-40 M long. 



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



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. LVIII, 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., 1/^-2 diam. long, 



oog., 26-33^ " 46-58 >j. long, 



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



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



