CEDOGONIACEJE. 159 



Wittr. Mon. GEdog. p. 18. Kirch. Alg. Schl. p. 53. Rabh. 

 Alg. Ear. iii. 348. 



Vesiculifera Rothii, Hassall, t. 53, f . 7 ? 

 Prolifera Rothii, Le Clerc Pro 1 if. 476, t. 23, f. 8 ? 



Scotland, Ireland, England. 



Mr. Archer mentions this plant as having been found by him with a 

 chain of as many as eleven oogonia in succession. Quart. Micro. Journ., 

 1861), p. 09. 



Plate L1X. fig 6. (Edogonium Rothii with oogonia, androsporangia, and 

 dwarf males X 400. 



CEdogonium Areschougii. Wittr. Lisp. (E.log.p. 122. 



Gynandrosporous. Oogonia 2-6, continuous or single, rather 

 depressedly globose, broadly cut round (circnmscissile) in the 

 middle, opening by a pore in the fissure. Oospore exactly 

 globose, not by any means filling the oogonium. Androspo- 

 rangia 1-6 celled, hypogynous or snbepigynous, or rarely 

 scattered, terminal cell (which sometimesis the androsporangium), 

 obtuse, dwarf males obversely egg-shaped, seated on the oogonia. 



SIZE. Cells -008--012 mm., 4-6 times as long ; Oogonia 

 038--039 x -036--04 mm. ; oospore '022--024 X '022--024 

 mm.; audrosp. cells Ol-'Ull X '01--012 mm.; dwarf males 

 006--007 X -014--015 mm. 



Archer in Quart. Journ. Micr. Sci. 1872, xii., p. 422. Wittr. 

 Mon. (Edog. p. 19. 



Ireland. 



Plate LIX. Jig 7. (Edogonium Areschougii with oogonia, andro- 

 sporangia, and dwarf males X 400 after Wittrock. 



(Edogonium pluviale. Nordst. Rab. Alg. Eitr. Nv. 2257. 



Idio-androsporous. Oogonia simple, rarely 2-3 continuous, 

 obversely egg-shaped, globose, or nearly globose, opening by a 

 terminal operculum, fissure narrow ; oospores nearly globose, 

 almost filling the oogonium, terminal cell obtuse, filaments 

 bearing the androsporangia a little slenderer than the female 

 filaments ; androsporangia 6-10 celled ; dwarf males broadly 

 obverse egg-shaped, seated on the oogonia. 



SIZE. Cells 018-'028 mm., equal to three times as long ; 

 oogonia -034--039 X -034--045 mm. ; oospore 032- < 037x 

 031--04 mm. ; androsp. cell -017--019 X '006--011 mm. ; 

 dwarf males -01 x '015 mm. 



Wittr, Mon. CEdog. p. 19. 



CEdogonium diplandrum, Jur. Beitr. (Edog. p. 27, t. 1-3. 

 Vesiculifera dissiliens, Hass. F. W. Alg. 202, t. 50, f. 7. 



Plate LIX. Jig. 8. CEdogonium pluviale with oogonia and dwarf 

 male x 400. 



