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



veg. cell, 16-23 fj. diam., i%-2 diam. long, 



oog., 3!-39M " 45-63 M long, 



andr. cell, 13-16 M " 10-27 /" " 



nan. stipe, 14-18 n " 22-27 /" " 



anth. cell, 8-10 /u, " 5-7 M " 



Mass., R. I., Conn., Pa. Europe. 



Var. HILOENSIS Nordstedt, 1878, p. 22; Wolle, 1887, p. 102, 

 PI. XC, figs. 2-3 ; Him, 1900, p. 361, PI. LX, fig. 377. Smaller, 

 vegetative cells longer, androsporangia generally epigynous, 

 more rarely scattered. 



veg. cell, 14-19 ju. diam., i%-2 l /2 diam. long, 



oog., 28-32 /x " 47-51 /xlong. 



andr. cell, 12-14/11 " 13-16 /u. " 



nan. stipe, 13-14 /" " 22-24 M " 



anth. cell, 8-9 M " 5-7^" 



Australia. 

 Wolle's reference is the only American report. 



B. rectangularis and B. varians resemble each other consider- 

 ably, but the latter is more branched and has shorter cells. 



17. B. REPANDA Wittrock, 1874, p. 55 ; Wolle, 1887, p. 102, 

 PI. XC, fig. 4 ; Him, 1900, p. 363, PI. L,XI, fig. 380 ; P. B.-A., 

 No. 814; B. rhadinospora Wolle, 1887, p. 103, PI. LXXXIX, 

 figs. 4 and 5. Dioecious, nannandrous, gynandrosporous ; 

 oogonia suboblong-ellipsoid, patent or erect, below androspo- 

 rangia, terminal setae or vegetative cells ; androsporangia 

 epigynous or subepigynous, i-?-celled; dwarf males near or on 

 oogonium ; antheridium exterior, i-3-celled ; vegetative cells 

 sometimes repand. 



veg. cell, 12-17 M diam., 2 ~3/^ diam long, 



oog., 26-36 n " 43-58 M long, 



andr. cell, ,13-15 M " 16-21 n " 



nan. stipe, 11-15 M " 21-27 /u. " 

 anth. cell, 7-10 ^ " 5-7 /x " 



Greenland, Mass., Me., N. J., Fla. Europe, 



18. B. INSIGNIS Pringsheim, 1858, p. 73, PI. VI, fig. 7 ; 

 Wolle, 1887, p. 101, PI. LXXXVIII, figs. 2 and 3 ; Him, 1900, 

 p. 364, PL LXII, fig. 383; P. B.-A., Nos. 1332, 1430. Dioe- 

 cious, nannandrous, gynandrosporous ; oogonia ellipsoid, erect 

 or patent, below androsporangia, terminal setae or vegetative 

 cells ; androsporangia epigynous or subepigynous, more rarely 

 scattered, i-?-celled ; dwarf males near or on oogonium ; anther- 

 ididium exterior, i-3-celled. 



