166 NEMATUPHYCE^E. 



Plate LXII. Jig. 4. (Edoyonium calcareum, with portions of male 

 and female plants ; a, female plant from Victoria tank, Kew Gardens 

 x 400. 



(Edogonium cardiacum (Hass}. Wittr. Disp. (Edog. 135. 



Oogonia single, between heart-shaped and globose, opening' 

 by a pore a little above the middle; oospores globose, not fill- 

 ing the oogonia ; male plants a little slenderer than the female ; 

 spermogonia 2-10 celled ; spermatozoids binate, terminal cells 

 obtuse. 



SIZE. Cells : fern. -018--03 mm. 2-7 times as long; cells : 

 male -015--025 mm. 2-6 times as long; oogonia -05--07 X 

 058- 086 mm. ; oospore -04^--06 X 042-'06 mm. ; sperm, cell 

 015--021 x -01--013 mm. 



Wittr. Mon. (Edog. p. 33 ; Kirch. Alg. Schles. p. 57. 



Vesiculifera cardiaca, Hass. F. W. Algse 203, t. 51, f. 4. 



Vesiculifera pnlchella, Hass. F. W. Algte 199, t. 50, f. 3. 



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



Britain. 



Plate LXII. jig. 5. (Edogonium cardiacum, oogonia with oospores 

 x 400. 



(Edogonium carbonicum. Wittr. Mon. (Edog. p. 74. 



Oogonia single or twin, obversely egg-shaped or ovate 

 globose, opening by a pore above the middle; oospores ellipsoid- 

 globose or nearly globose, scarce filling the oogonia ; male plants 

 a little slenderer than the female ; spermogonia 2-5 celled ; 

 spermatozoids binate ; terminal cell obtuse. 



SIZE. Cells: fern. '016- - 03 mm. 3-6 times as long ; cells: 

 male -014--016 mm. 3-6 times as long; oogonia '043-'052 x 

 05--072 mm. ; oospore '042--05 x '046--056 mm. ; sperm, cell 

 013--014X-012--014 mm. 



Britain. 



Plate LXIII. fig. 1. (Edogonium carbonicum with oospores. 1. a, 

 portion of male plant with spermogonia x 400. 



(Edogonium Fzingsheimii. Cramer. Hedw. in. 17 t, 1 c, f. 1-4. 



Oogonia single or 2-6 continuous, somewhat egg-shaped 

 globose, opening by an operculum, with a very narrow and 

 scarcely distinct fissure ; oospores globose, not distinctly filling 

 the oogonia ; male plants a little slenderer than the female ; 

 spermogonia 2-10 celled, alternate with the vegetative cells in 

 the upper part of the filament ; terminal cell obtuse or rarely 

 shortly apiculate. 



SIZE. Cells : fern. 012-'02 mm. 2-4 times as long ; cells : 

 male 011- 1 016 mm. 2-4 times as long; oogonia -03- f 043 x 



