166 NEMATOPHYCE. 
Plate LXII. fig. 4. Edogonium caleareum, with portions of male 
and female plants; a, female plant from Victoria tank, Kew Gardens 
x 400. 
Gdogonium cardiacum (Hass). Wittr. Disp. @idog. 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. 
Sizz. Cells: fem. -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 *042-"06 x ‘042-06 mm.; sperm. cell 
°015--021 x -01--013 mm. 
Wittr. Mon. Gidog. p. 33; Kirch. Alg. Schles. p. 57. 
Vesiculifera cardiaca, Hass. F. W. Alge 203, t. 51, f. 4. 
Vesiculifera pulchella, Hass. F. W. Alge 199, t. 50, f. 3. 
Gdogonium pulchellum, Rabh. Alg. Eur. iii. 356. 
Britain. 
Plate LXII, fig. 5. Cdogonium cardiacwm, oogonia with oospores 
x . 
Gdogonium 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. 
Sizz. Cells: fem. ‘016-03 mm. 3-6 times as long; cells: 
male -014--016 mm. 3-6 times as long; oogonia *0438-052 x 
05-072 mm.; oospore -042-'05 x :046--056 mm.; sperm. cell 
013-014 x :012-:014 mm. 
Britain. 
Plate EXTII. fg. 1. Cdogonium carbonicum with oospores. 1. a, 
portion of male plant with spermogonia x 400. 
Gdogonium Pringsheimii. Cramer. Hed, 111.17 t, 1c, 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: fem. +012-"02 mm, 2-4 times as long; cells: 
male -011-'016 mm, 2-4 times as long; oogonia -03-043 x 
