1907] Collins, — Some New Green Algae 201 
Vaucheria longipes n. sp.  Filamentis 80-90 m diam., sparse et 
irregulariter ramosis; ramo sporifero, 30-40 «u diam., sub angulo 
recto exeunte, 1-6 mm. longo, antheridium terminale, cylindricum 
aut paulo attenuatum, hamatum vel circinatum sustinente; oogoniis 
2—4, ovoideis, subobliquis, pedicellatis, 70-85 X 35-40 yw, antheridium 
superantibus; rostro 15 u longo; pedicellis 100—150 x longis, 20-30 yx 
diam., sub antheridio ortis. 
Filaments 80-90 u diam., oogonia and antheridia borne at the end 
of a branch 1-6 mm. long, 30-40 p diam.; antheridium terminal, 
cylindrical or slightly tapering, hooked or circinate; oogonia 2-4, 
ovoid, somewhat oblique, pedicelled, 70-85 X 35-40 y, usually sur- 
passing the antheridium; pedicels 100—150 x» long, 20-30 y diam., 
arising just below the antheridium; beak 15 » long. In a ditch by 
the roadside, Ross Valley, California, Jan., 1904. N. L. Gardner. 
Somewhat resembling V. geminata, but distinct by the very long 
fruiting branches, at right angles to the filaments, as well as by the 
more elongate oogonia, borne on longer pedicels. 
V. Gardneri n. sp. Filamentis 50-70 yw diam., sparse ramosis, 
ramis sub angulo recto exeuntibus, non attenuatis; chromatophoris 
parvis; antheridiis plerumque solitariis, raro 2—4, et oogoniis 2—4, 
raro pluribus, pedicellatis, pedicellis basi connatis, 60—100 yp longis, 
15-20 u diam.; antheridii pedicello angulo recto vel subrecto posito; 
pedicellis oogoniorum circumcirca positis, sub angulo 45? exeuntibus; 
antheridio hamato vel circinato, ad 10 » diam. attenuato; oogoniis 
plerumque sat obliquis, saepe introrsum concavis, 85-95 X 70-75 p; 
plerumque antheridium superantibus; rostro circa 15 y longo. 
Filaments 50—70 x diam., sparingly branched, branches issuing at a 
right angle, not tapering; chromatophores small; antheridia generally 
single, rarely 2-4; oogonia 2—4, rarely more; both pedicelled, pedicels 
connate at the base, 60-100 u long, 15-20 p diam.; pedicel of the 
antheridium at a right angle or nearly so; pedicels of the oogonia 
arranged around it at an angle of about 45?; antheridium hooked or 
circinate, tapering to 10 « diam.; oogonia usually quite oblique, 
often concave on the inside, 85-95 X 70-75 p; generally surpassing 
the antheridium; beak about 15 &long. In a small pool, Mountain 
View Cemetery, Oakland, California, May 6, 1903; in a ditch by the 
roadside, Berkeley, California, April 15, 1905. N. L. Gardner. Dis- 
tributed as P. B.-A., No. 1288. 
Forma tenuis n. forma. Filamentis 30—40 «u diam.; oogoniis et 
antheridiis ut apud formam typicam, sed numeris variantibus; 
antheridiis haud infrequenter 2, oogoniis 1—5. 
Filaments 30—40 » diam., oogonia and antheridia as in the type, 
but in varying numbers; antheridia not infrequently 2, oogonia 1—5. 
In company with V. longipes. 
This species is not unlike V. longipes, but the pedicels bearing the 
