160 NEMATOPHYCES. 
G@dogonium undulatum. (Breb.) Br. in De Bary Edog. p. 94. 
Oogonia single or twin, ellipsoid-globose, or nearly globose, 
opening by a pore below the middle; oospores ellipsoid-globose, 
or neatly globose, nearly filling the oogonia; vegetative cells 
four times undulatingly constricted ; terminal cell (which some- 
times is the oogonium) obtuse; dwarf males obconical, seated 
on the supporting cells. 
Sizz. Cells :015--017 mm., 3-5 times as long ; oogonia 
051-056 x -057-075 mm.; oospores *046-"05 x :048--06 
mm.; dwarf males, -009-01 x :0. 
Wittr. Mon. Gidog. p. 20. Kirch. Alg. Schles. p. 54. 
Rabh. Alg. Eur. iii. 351. 
Conferva undulata, Brebisson. 
Cymatonema confervaceum, Kutz. Tab. iii., t. 47, f. 1. 
Scotland. 
Plate LIX. fig.9. Cdogonium undulatum with oogonia and dwarf 
male x 400. 
Gdogonium Reinschii. Roy MSS. 
Mr. Roy has announced that the Cymatonema figured by 
Reinsch (Contrib. t. 6, 7.7) has been found in Scotland, and 
is a genuine @dogonium, but no further details have tran- 
spired, and we know nothing of the fructification. The sterile 
cells are figured on Plate LVII. fig. 28. 
B. Dwarf males bicellular, spermogonia internal. 
Gdogonium depressum. rings. Beitr. 69, t. 5, f. 5 
Gynandrosporous. Oogonia single, depressedly globose, 
opening by a pore at the middle. Oospores depressedly 
globose, not filling the oogonia; androsporangia 2-celled; 
dwarf males oblong, obversely egg-shaped, one-third part 
shorter than the oogonia on which they are seated. 
Sizz. Cells :008-009 mm., 3-6 times as long ; oogonia 
°028 x °026 mm. ; oospores 023 x ‘017 mm. 
Wittr. Mon. Cidog. p. 21. Kirch. Alg. Schles. p. 54. 
Rabh. Alg. Eur. iii, 349. 
Vesiculifera equale, Hassall, t. 53, f. 3? 
Scotland. 
Plate LX. fig. 1. Edogonium depressum with oosporangia, oospores, 
dwarf males, and bicellular androsporangia x 400. 
C. Dwarf males bimulticellular, spermogonia external. 
a. Oospores with smooth membrane. 
a Oospores globose or subglobose. 
Gdogonium flavescens. (Hass.) JWittr. Disp. Edog. p. 127 
Idio-androsporous. Ovgonia single, egg-shaped-globose 
