176 NEMATOPHYCE^. 



Wittr. Mon. CEdog. p. 48. Kirch. Alg. Schles. p. 61. 

 Rabh. Alg. Eur. iii., p. 357. Quart. Journ. Micr. Sci., 1866, 

 p. 276. 



Britain, Ireland. 



Plate L XVI II. Jig. 4. Bulbochcete gigantea, with oogonium and 

 dwarf male x 400. 



SECTION 2. Oogonia ellipsoid or subellipsoid. 



SUB-SECTION 1. Species monoecious. 

 Bulbochoete mixabilis. Wittr. Disp. CEdog. 137, t. I,/. 8, 9. 



Oogonia ellipsoid, or rather oblong-ellipsoid, patent, or rarely 

 erect, seated beneath terminal setse or vegetative cells ; sperrno- 

 gonia 2-4 celled, erect (rarely patent), subepigynous, or 

 scattered. 



SIZE. Cells '016-'02 mm. l^-lf times as long ; oogonia 

 027--035 x -046--056 mm. ; sperm, cell -01--012 x -Q07--009 

 mm. 



Wittr. Mon. CEdog. p. 50. 



Britain, Ireland. 



Plate L XV III. fig. 2. Bulbochcete mirabilis, with oogonia and 

 androsporangia x 400. 



SUB-SECTION 2. Species dioecious. 

 Bulbochoete pygmoea. Wittr. Disp. CEdog. p. 141. 



Oogonia ellipsoid, patent, seated beneath terminal seta?, or 

 vegetative cells, in longitudinal section rather quadrangular ; 

 androsporangia scattered, dwarf males seated about the oogonia. 

 (Filament at first short, and curved.) 



SIZE. Cells '012-'015 mm. x a third part shorter or equal; 

 oogonia '023- f 025 x 034- > 04 mm.; stem of dwarf males 

 011--012 x -015--018 mm.; sperm cell -007--0075 X 

 007--0075 mm. 



Wittr. Mon. GEdog. p. 52. Quart. Journ. Micr. Sci. 1870, 

 p. 89. 



Bulbochcete pygmcea, /3. minor, Prings. Beitr. p. 74, t. 6, f. 

 10. 



Ireland, Britain. 



Plate LXVIII. fig.5> Plant of Bulbochcete pygmoea, with oogonium 

 and (a) section of oospore x 400. 



Bulbochoete insignis. Prings. Beitr. 72, i. 6, f. 7. 



Oogonia ellipsoid, patent or erect, seated beneath andro- 

 sporangia or terminal setee ; epispore delicately transversely 

 striate ; androsporangia epigynous, or rarely scattered ; dwarf 

 males seated about or upon the oogonia. 



