170 NEMATOPHYCES. 
Size. Cells :009--011 mm., 4-8 times as long; oogonia 
‘025 mm. diam ; oospore ‘016-018 mm. 
Rabh. Alg. Eur. iii., 355. 
Deeside (Scotland). 
Plate LXVI. fig. 6. Edogonium tenellum, with oogonia x 400. 
Gdogonium hexagonum. Kutz. Tad, 111., t. 35, f. 3. 
Oogonia almost globose ; oospores globose, rufous-brown, not 
filling the oogonia; basal cell bifurcate ; terminal cell often 
setigerous, 
Sizz. Cells ‘011-013 mm. 2-4 times as long; oogonia 
*025 x :025 mm.; oospore ‘016 mm, 
Rabh. Alg. Eur. iii. 354. 
Vesiculifera hexagona Hassall Alge t. 53, f. 11-12. 
Deeside (Scotland). 
Plate LXVI. fig. 8. Cidogonium hexagonum, with oogonia x 400. 
Gdogonium Londinense. Wittr. Mon. Zdog. p. 39. 
Moneecious? oogonia twin or single, globose, cut round (cir- 
cumscissile) in the middle, opening by a pore seated in the 
fissure ; oospores globose, almost filling the oogonia ; spermo- 
gonia (or androsporangia ?) 1-2 celled, hypogynous. 
Size. Cells :01--015 mm. 1} to 5 times as long; oogonia 
033-035 x °033-°043 mm.; oospore :027-0382 x +027-032 
mm. ; sperm. cells -026-:027 x ‘027-029 mm. 
England. 
Plate LXV. fig. 4. Cidogonium Londinense with oogonia x 400. 
CGdogonium fasciatum. Kutz. Tab. 111., t. 34, f. 6. 
Oogonia somewhat globose ; oospores globose, rufous-brown, 
almost filling the oogonia ; basal cell usually bilobate, terminal 
cell obtuse. 
Sizz. Cells -028-'03 mm., twice as long ; oogonia ‘04 mm. ; 
oospore *03-'032 mm. 
DeBary Cidog. t. 3, f. 23-28. Rabh. Alg. Eur. iii., 354, 
Vesiculifera fasciata Hassall Alge t. 53, f. 6. 
Deeside (Scotland). 
Plate LXVI. fig. 2. Cidogonium fasciatum, with oogonia x *400. 
CGdogonium capillaceum. Kutz. Phy. Gen. 255. 
Dark green, basal cell attenuated downwards, bifid, terminal 
point obtuse, cells sub-cylindrical ; oogonia broadly elliptical, 
2-4 often contiguous, opening by a lateral pore ; oospore nearly 
