— 161 — 
9. 0. parvulum A. Braun Alg. Unicell. 1855, p. 55. Brochidium 
parculum Perty 1852. 
With the preceding species in muddy ricefield. 
Area: Europe, N. America, Ceylon, Sumatra, Australia, and W. Africa. 
Ord. Conjugate. 
Fam. Zygnemacee. 
Spirogyra Link. 
10. S. neglecta Kitz. Spec. Algar. 1849, p. 441; Rabenh. Flor. 
Europ. Algar. Ul, p. 248; Petit Spirog. de Paris, p.26, t-IX, f. 1—5. 
Zygnema neglecta Hass. 1845. : 
Crass. cell. veget. 65 7; long. zygosp. 84—92 yw; lat. zygosp. 61 —66 ps. 
In stagnant water in riverbed. 
Area: Europe and N. America, West Indies, Central and W. Africa (var. 
ternata). Ceylon. 
11. §. decimina (Miill.) Kitz. Phyc. Germ. p. 223; Rabenh. Flor. 
Europ. Algar. II, p. 242; Petit Spirog. de Paris, 1880, p. 25, t. VIII, 
f 1—3. 
Forma major, cellulis vegetativis diametro 21/2-—5 (usque 6)-plo lon- 
gioribus; cellulis fructiferis non inflatis; chromatophoris 3 cum marginibus 
asperis, anfractibus 21/2—41/2. 
Crass. cell. veget. 46—50 ; long. zygosp. 81—92 yw; lat. zygosp. 
46—49 p. 
In stagnant water. 
Area: Europe, N. America, Madagascar and Ceylon. 
12. §. Schmidtii West & G. S. West, n. sp. (Tab. nostr. IV, fig. 43 
—45). 
S. cellulis vegetativis diametro 7—-10-plo longioribus, extremi- 
tatibus non replicatis; chromatophoris 2--3, angustis, laxis, cum 
marginibus leviter crenulatis et pyrenoidibus magnis, anfractibus 
2ye—4; conjugatione scalariformi, cellulis fructiferis inflatis; zygo- 
sporis elongato-ellipsoideis, diametro 2—21/.-plo longioribus, polis 
rotundatis vel conico-rotundatis; membrana zygospore mature 
crassa, lutea —- brunnea, mesosporio scrobiculato. 
Crass. cell. veget. 31—35; crass. cell. fruct. 53—59 »; long. 
zygosp. 88—118 4; lat. zygosp. 44—46 yu. 
It is perhaps nearest to S. fluviatilis Hilse but is distinguished by 
its less diameter, its longer cells, its fewer and different chromatophores, 
and by the form of its zygospores. 
In stagnant water in riverbed among S. neglecta and S. gracilis. 
11* 
