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



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

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



N. J., Pa. 



Probably a local form. 



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

 and 2; Him, 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 M diam., 5-11 diain. long, 



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



Florida. 



Var. BATHMIDOSPORUM (Nordst.) Him, 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 /" diam., 3-8- diam. long, 



suf. cell, 15-22 M " 2/2-5 



oog., 30-40,0. " 40-54 M long, 



nan. stipe, 9-11 M " 9-12 M " 



ANTHERIDIUM INTERIUS, PORIFERA, ELLIPSOSPORA. 



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

 and 7 ; Hirn, 1900, p. 252, PL XLJII, 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, 21-30 M diani., 2-10 diam. long, 



suf. cell, 42-48 M " i-V2,'< " 



oog., 57-66,1* " 70-100 fj. long, 



oos., 51-62 ^ " 60-75 M " 



anth. cell, 23-30 /j. " 12-30 M " 



nan. cell, 12-15 M " 50-58 M " 



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

 country. We have 



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



