CEDOGONIACE^E. 161 



(sometimes rather hexagonally globose), opening by a pore a 

 little above the middle ; oospores globose, not filling the 

 oogonia ; androsporangia 1-9 celled ; dwarf males a little 

 curved, seated on the supporting cell ; spermogonia 1 (or 2 ?) 

 celled. 



SIZE. Cells '01S--021 mm. by 4J to 6 times as long; 

 oogonia -049--052 x -051--060 mm. ; oospore -045--049 x 

 045--049 mm.; androsp. cell -017--02 x '008--018 mm.; 

 sperm, cells -009--01 X -015--02 mm. 



Wittr. Mon. (Edog. p. 21, t. 1, f. 12-14. 



Vesiculifera Jtavescens, Hass. F. W. Alg. 206, t. 53, f. 9. 



Plate LX. fig. 2. (Edogonium Jlavescens with single and twin 

 oogonia; a, androsporangia x 400. 



(Edogonium Braunii. Kutz. Sp. Alg. p. 366. 



Gynandrosporous. Oogonia single, ellipsoid, globose, open- 

 ing with a pore at the middle ; oospores globose, not filling 

 the oogonia ; androsporangia 1-2 celled ; dwarf males a little 

 curved, seated about the oogonium, often on the supporting 

 cells ; spermogonia 1-celled. 



SIZE. Cells -013--015 mm., 2-4 times as long ; oogonia, 

 03--033 X -033--036 mm. ; oospore -027--029 x '027--029 mm. ; 

 androsp. cell -014--015 x '011--012 mm.; sperm, cell '005 x 

 009 mm. 



Prings. Beitr. p. 70, t. 5, f. 6. Wittr. Mon. (Edog. p. 22. 

 Kirch. Alg. Schles. p. 55. Archer in Quart. Journ. Micr. 

 Sci. 1866, p. 69. Rabh. Alg. Eur. iii. 349. 



Britain, Ireland. 



Plate LX fig. 3. (Edogonium Braunii with oogonia, oospores, and 

 dwarf males x 400. 



(Edogonium macrandum. Wittr. Disp. (Edog. 130, t. I,/. 3-5. 



Oogonia single or twin (rarely three), obversely egg-shaped 

 or globosely egg-shaped, opening by an operculum, with a very 

 narrow fissure ; oospores globose or egg-shaped globose, not 

 filling the oogonia; terminal cell very shortly apiculate ; dwarf 

 males very much curved, seated on the oogonia (stem some- 

 times 2-3 celled) ; spermogonia many (to 7) celled. 



SIZE. Cells -015--016 mm., 3-5 times as long; oogonia 

 036--04 x -043--054 mm. ; oospore -031--034 x -033--039 mm. ; 

 sperm, cell -009 mm. 



Wittr. Mon. (Edog. p. 24; Archer Quart. Journ. Micr. Sci. 

 1875, xv., p. 413. 



Ireland, Britain. 



Plate LX. fig. 4. (Edogonium macrandum with oogonia and dwarf 

 males x 400. Fig. 4. a, dwarf males seated upon the oogonium after 

 Wittrock. 



