186 ULOTHRICACEAE 
9. f. 36-40. pl. 10. f. 55, 56. 1881 ; Jahrb. wiss. Bot. 18: ۸ ۰ 
کر‎ 64-68. 1887. DeToni, Syll. Ale 1: 216. 1889. 
Conferva minor Klebs, Fortpflanz. Alg. und Pilz. 347. pl. 2. f. 
1-8. 1896. 
Cells generally cylindrical, sometimes very slightly swollen, 
5-6 » in diameter, 2-4 or more rarely 6 times as long as broa 
chromatophores 2-4 in each SCH arranged symmetrically i in pairs 
for the most part (P. 25, f. 7, 8 
Massacuusetts : Melrose, April (550A, 552B). 
Connecticut: New Preston, September (495A). 
' New York: Bronx Park, May (421), June (443C, 626B) ; 
Staten Island, April (328). 
New Jersey: Undercliff, Bergen county, May (428), De- 
cember (233). 
After a number of observations and cultures, the distinctness 
of this species as defined by Klebs has been confirmed. It differs 
markedly in the character of the chromatophores from any form 
of Tribonema bombycinum. 
3. Tribonema utriculosum (Kütz.) 
Conferva utriculosa Kitz. Ale Dec. 774. 1836 ;* Spec. Alg. 
472: 3549; Tab. Piye 3: M. ce Es 1833.‘ Roemer, Alg. 
Deutsch. A. 5. f. 79. 1845. Wille, Öfvers. Vet. Akad. Förhand. 
1881*: 22. pi. ro. f. 67. 1881. Wolle, F. W. Ale, 140. p/. 720. 
f. 14-16. 1887. DeToni, Syll. Ale 1: 217. 1889. 
C. ventricosa Kitz. Phyc. Germ. 203. 1845. 
Filaments long and often irregularly inflated, but sometimes 
cylindrical; cells 11—16.5 » in diameter, 114-6 times as long; 
chromatophores large and often crowded : cell-wall thicker than 
in the smaller species (//. 25, f. 9—11). 
Exsic.: Phyc. Bor. Am. 864. .م‎ p. (sub Microspora floccosa) 
Melrose, Mass., May 15, 1901 (F. S. Collins). 
In slow or rapid streams, frequently in the outlets of swamps. 
New York: Van Cortlandt Park, April (347), May (418). 
New Jersey: Hudson Heights, May (435C); Grantwood, 
May (429, 573C, 579A). 
This species probably includes forms sometimes identified as 
Conferva bombycina major Wille. The original diagnosis of the lat- 
* Citation from Kütz. Spec. Alg. 372. 
