172 NEMATOPHYCE.E. 



Kutz. Tab. Phy. iii., t. 33, f. 6. Wittr. Mon. (Edog. p. 38. 

 Britain. 



Plate LXIV. fig. 4. (Edogonium longatum, parasitic upon another 

 Bpecies, with oogonia x 400. 



(Edogonium vesicatum. (Lyngb.) Wittr. Mon. (Edog. p. 39. 



Oogonia single, ellipsoid, globose, opening by an operculum, 

 with a narrow fissure ; oospores ellipsoid-globose, almost filling 

 the oogoninm. 



SIZE. Cells '017--21 mm. 1^-3 times as long ; oogonia 

 043--045 x '051--06 mm. ; oospore -037--038 X -041--042 

 mm. 



Kirch. Alg. Schles. p. 59. 



Conferva vesicata Lyngb. Hydro. 144, t. 47, f. D 1. Eng. 

 Bot. t. 2476. 



Scotland. 

 Plate LXV. Jig. 5. (Edogonium vesicatum, with oogonium x 400. 



(Edogonium grande. Kutz. Tab. Pliy. in, i. 37, /. 1. 



Oogonia oval-elliptic, nearly twice as long as broad ; oospores 

 oval-elliptic, entirely filling the oogonia ; basal cell contracted 

 towards the base, then dilated and discoid ; terminal cell 

 obtuse. 



SIZE. Cells -025- -035 mm. 3-4 or 5 times as long ; oogonia 

 1 x '07 mm. ; oospore "09 x *OG5 mm. 



DeBary (Edog. t. 2, f. 1-14. Rabli. Alg. Eur. iii., 353. 



Scotland. 



Plate LXVI. ng. 4. (Edogonium grande, with oogonium x 400. 

 (Edogonium giganteum. Kutz.Phyc. Germ. p. 200. 



Oogonia single, a little swollen, cylindrically egg-shaped, 

 opening with a pore above the middle ; oospores cylindrically 

 ellipsoid, nearly filling the oogonia (sometimes flask-shaped, 

 short necked, and then filling the oogonia), epispore delicately 

 scrobiculate, supporting cells rather swollen. 



SIZE. Cells '03--024 mm. 2-41 times as long ; supporting 

 cells '054--06 mm. H-lf times as long ; oogonia 057-'OG9 x 

 078--106 mm. ; oospore '054--065 x -075--1U3 mm. 



Kutz. Tab. Phyc. iii, t. 37, f. 2. Wittr. Mon. (Edog. p. 42. 

 Kirch. Alg. Schles. p. 59. 



Vesiculifera lacustris Hass. F. W. Algaa 198, t. 52, f. 1. 



(Edogonium lacustre Rabh. Alg. Eur. iii, 356. 



Plate LXV. fig. 3. (Edogonium giganteum, with oogonia x 400. 



