HERPOSTEIRON 231 
f. 3. 1883. Wolle, F. W: Ale 119. A. 705. f. 8. 1887. Wille; 
Eng. & Prantl, Nat. Pflanz. 1: 95. f. 58. 1890. Klebahn, سی‎ 
wiss. Bot. 25: 294. ۸ 74. f. 7-4. 1893. Huber, Bull. Soc. Bot. 
France, 41: XCIV-CIII. AM. 7. 1894. Klebs, Fortpflanz. Alg. 
und Pilz. 404. pl. 3. f. 79-22. 1896. Chodat, Beitr. Krypt. Flor. 
Schweiz, 1°: 324-329. کر‎ 240-243. 1902. 
Aphanochaete confervicola Rabenh. Flor. Eur. Ale 3: 391. 
1868. 
Herposteiron repens Wittr. Bih. Svensk. Vet. Akad. Hand. 31 : 
27. 1872. 
Herposteiron Braunii Huber, ex Nag. MS. Ann. Sci. Nat. Bot. 
Lc. De Wild. Flor. Alg. Belg. 38. 1896. 
Cells subglobose to nearly cylindrical ; setae usually solitary, 
3-4 4 thick at the base, very slender above, often 160 £ long, 
frequently absent or disappearing early ( 77. 42, f. 5-7). 
Exsic.: Tid. Am. Ale 733, St. Paul, Minn., May, 1896. Phyc. 
Bor. Am. 762, Wright’s Pond, Middlesex Fells, Mass., 19 August 
1900 (F. S. Collins). 
Epiphytic on various confervae, especially Oedogonium, usually 
in quiet waters. 
VERMONT: St. Johnsbury, July (688), October (648, 650), 
November (668). 
MASSACHUSETTS: Middlesex Fells, Wright's Pond, 11 July 
1900 (448) ; Peabody, 24 September 1890 (F. S. Collins). 
New York: Van Cortlandt Park, May (424). 
New JERSEY: Greenwood Lake, Setember (467). 
DouBTFUL Form 
APHANOCHAETE VERMICULOIDES Wolle, F. W. Alg. 119. ۸ 705. 
f. 9, 10. 1887. De Toni, Syll. Alg. 1: 180. 1889. 
Exsic.: Phyc. Bor. Am. 767, Norwich, Conn. (W. A. Setchell). 
Wolle's description and figures of this species do not show its 
right to be placed in this genus. No specimen could be found in 
his herbarium, nor does the exsiccata quoted shed light on the 
character of the form. 
1 SUMMARY 
1. In the Ulothricaceae twenty-seven species and two formae 
are recognized ; of these, three species and one forma are new to 
