Smith—Monograph of Scenedesmus. 
463 
Conrad et Kufferath, 1912, p. 321. Brunnthaler, 1913, pp. 168, 
171; Fig. 14. Chodat, 1913, p. 23. Reinhardt, 1913, p. 103. 
S. hystrix (emend.). Chodat, 1902, p. 214; Figs. 138A, 138D- 
138J. Volk, 1905, p. 64. Migula, 1907, p. 657. Ostenfeld, 1907, 
p. 384. 
S. hystrix var.. echinulatus. Chodat, 1902, p. 215; Figs. 138K- 
138L. Migula, 1907, p. 657. 
S. serratus var. hystrix. Hansgirg, 1905, p. 458. 
S. hystrix forma echinulatus cohaerens. Volk, 1905, p. 64. 
S. hystrix cohaerens. Volk, 1905, p. 64. Selk, 1907, pp. 5, 68. 
S. hystrix forma echinulatus. Selk, 1907, pp. 61, 68, 76, 108. 
“Sc. cellulis binis, quaternis, octonis, oblongo-cylindricis 
utroque polo obtusis, omnibus rectis, in seriem simplices 
rectam conjunctis, non alternantibus. Membrana cellu- 
larum aculeis parvis numerosis dense vestita. 
“Dimens. cell. 12 x 3, 15 x 4, 17 x 6, 18 x 5 y.” 
The emended description of Chodat in which a hetero¬ 
geneous group is combined under the name hystrix is wholly 
without justification. Since the presence of short spines 
over the entire wall constitutes a very sharply defined char¬ 
acter, classifying algae that are characterized by teeth, at 
one end, by lateral ridges only, or by lateral ridges combined 
with long horns, in the same genus is highly confusing. 
GEOGRAPHICAL DISTRIBUTION 
EUROPE. Austria-Hungary (Brunnthaler, 1907; Hansgirg, 
1905; Pascher, 1906; Reinhardt, 1905, 1913). Belgium (Conrad et 
Kufferath, 1912; de Wildemann, 1893B, 1895, 1897B). England 
(Fritsch, 1906; West and West, 1901B). France (Cozette, 1904; 
Fournier, 1903). Germany (Lemmermann, 1899, 1905B, 1907B; 
Schroder, 1897A, 1897B, 1897C, 1898, 1899; Selk, 1907; Volk, 
1903, 1905). Ireland (Adams, 1908; West and West, 1902B). 
Italy (Forti, 1902; Garbini, 1899A; Lemmermann, 1908C). Rou- 
mania (Teodoresco, 1907). Scotland (West and West, 1904, 
1909B). Sicily (Lemmermann, 1908A). Sweden (Lagerheim, 
1883, 1886). Switzerland (Chodat, 1901, 1902; Huber, 1905, 1908). 
POLAR AND SUB-POLAR REGIONS. Faeroes. (Boergesen 
and Ostenfeld, 1903). 
ASIA. Mongolia (Ostenfeld, 1907). 
AMERICAS. Brazil (Bohliii, 1897). Paraguay (Bohlin, 1897). 
Puerto Rico (Collins, 1909; Lagerheim, 1887). 
