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



figs. 10 and n. Filaments of few cells, vegetative cells shorter 

 than in the type, 14-16 /x diam., 3-5 diam. long. 



N. J., Pa. 



Probably a local form. 



Var. FLORIDENSE Wolle, 1887, p. 83, PI. LXXXV, figs, i 

 and 2 ; Hirn, 1900, p. 246, PI. XLJ, fig. 258. A slender form, 

 with long vegetative cells, suffultory cells more swollen than in 

 the type ; dwarf males very long, stipe 2-3-celled. 



veg. cell, 7-8 fj. cliam., 5-11 diaiu. long. 



oog., 33-35 M " 45-50 /x diam. 



Florida. 



Var. BATHMIDOSPORUM (Nordst.) Hirn, 1900, p. 246, PI. 

 XLJI, fig. 259; Oe. acrosporum, P. B.-A., No. 163. Smaller, 

 with fewer ridges on oogonium and oospore, about 11-17, dis- 

 tinctly crenate, with distinct striae between ; stipe of dwarf 

 male unicellular. 



veg. cell, 12-17 M diam., 3-8 diam. long, 



suf. cell, 15-22 fj. " 2^2-5 " " 



oog., 30-40 /u " 40-54 M long, 



nan. stipe, 9-11 p. " 9-12 /u " 



ANTHERIDIUM INTERIUS, PORIFERA, ELLIPSOSPORA. 



63. OE. CYATHIGERUM Wittrock, 1870, p. 131, PI. I, figs. 6 

 and 7 ; Hirn, 1900, p. 252, PL XIJII, fig. 265. Dioecious, 

 nannandrous, idioandrosporous ; oogonia single or 2-3, subovi- 

 form or quadrangular-ellipsoid, pore superior ; oospore same 

 form as the oogonium, filling it, membrane triple ; outer mem- 

 brane smooth, median membrane with 16-25 longitudinal, 

 continuous, rarely anastomosing, often curved, ridges, inner 

 membrane smooth ; basal cell elongate, terminal cell, which 

 sometimes is an oogonium, obtuse ; dwarf males goblet-shaped, 

 curved, on the suffultory cell, rarely on the oogonium ; anther- 

 idium interior. 



veg. cell, 

 suf. cell, 

 oog., 

 oos., 



anth. cell, 

 nan. cell, 



The type is European, and has not yet been found in this 

 country. We have 



Forma ORNATUM (Wittrock) Hirn, 1900, p. 254, PI. XLJII, 



