168 NEMATOPHYCE^E. 



Vesiculifera Boscii, Hassall Algze t. 52, f. 3, 4, 5. 

 Prolifera Boscii, Le Clerc Prolif. 474, t. 23, f. 5. 

 Vesiculifera elegans, Hass. Ann. Nat. Hist. 



England. 



Plate LXT1I. fig. 4. (Edogonium Boscii, with oogonia x 400. 

 (Edogonium tumidulum. Kutz. Dec. Alg. No. 60. 



Oogonia single, ellipsoid egg-shaped, opening by a pore above 

 the middle, almost filling the oogonium ; male plants a little 

 slenderer than the female ; spermogonia 6-45 celled ; eperma- 

 tozoids binate. 



SIZE. Cells: fern. -018--025 mm. 3^-5 times as long; 

 cells : male -015-^018 mm. 4 times as long ; oogonia '056-'058 

 x -078--09 mm.; oospore -049--054 x '061-'068 mm.; sperm, 

 cell -015--017 x -009--012 mm. 



Wittr. Mon. (Edog. p. 35. Kirch. Alg. Schles. p. 58 (not 

 of Pringsheim). 



Ireland. 



Plate LXIII. fig. 5. (Edogonium tumidulum with oogonium. 5 a, 

 portion of male plant with spermogouia x 400. 



(Edogoniuxn Landsbozoughii (Hass). Wittr. Mon. (Edog. p. 35. 



Oogonia single, rarely twin, obversely egg-shaped, opening 

 by a pore above the middle ; oospores obversely egg-shaped, 

 filling the oogonia (or rarely ellipsoid and not filling the 

 oogonia) ; male plants a little slenderer than the female ; sper- 

 mogonia 5-25 celled ; spermatozoids binate, with a vertical 

 division ; terminal cell obtuse. 



SIZE. Cells : fern. '033-'036 mm. 4-6 times as long: cells : 

 male *031-'033 mm. 4-6 times as long ; oogonia '063- - 075 x 

 1--12 mm. ; oospore -057-'07 X '075- - 1 nim. ; sperm, cell 

 027--03X-009--012 mm. 



Kirch. Alg. Schles. p. 58. 



(Edogonium rivulare, Rabh. Alg. iii. p. 350, in part. 



Vesiculifera Landsboronghii, Hassall, F. W. Alga3 t. 51, f. 2. 



(Edogonium gemelliparum, Hantsch, Rab. Alg. Ear. 1118. 



(Edogonium gemelliparum v. major, Wittr. Disp. (Edog. p. 

 137. 



Britain. 



Plate LX1V. fig. 1. (Edogonium Landsborougliii, with oogonia and 

 oospores x 400. 



var j8. gemfellipamm (Prinys). Wiftr. Mon. (Edog. p. 36. 



Smaller than the typical form. Oogonia egg-shaped; oospores 

 filling the oogonia ; terminal cell very long, somewhat hyaline. 



