MYXONEMA 205 
9. Myxonema aestivale sp. nov. 
ight green, growing in dense tufts 2-5 (rarely 15) mm. long; 
filaments radiating from a palmelloid base; branches dichotomous 
or alternate, erect; branchlets few, short, erect, very slender, fre- 
quently approximate near the summit, often attenuate into fine 
setae; cells thin-walled, somewhat swollen, 7-9 » (rarely 11 زم‎ in 
diameter, 2-6 times as long, above about equal to the diameter 
(2l. 33, f. 1-3). 
Forming a cespitose covering on the edge of iron fountains 
and watering troughs. 
VERMONT : St. Johnsbury, April (673, 674). 
Connecticut: Thomaston, September (493). 
New York: Botanical Garden, June (630), September (479), 
October (498, 652, 653); Manhattan, July to November (459, 
489, 483, 487, 510, 463, 654). 
This species appears to be very similar in its general character 
to Stigeocloniun radians Kitz. and S. fastigatum Kütz., but from 
the fact that it never attains the size of these two species, and 
appears to be fully mature and not a young form, we have felt 
obliged to consider it an undescribed species. It is distinguished 
from the forms mentioned, aside from its smaller size, by longer 
cells, less abundant branches and less developed setae. This is 
essentially a summer form; we have not found it in New York 
earlier than June, but it is rather abundant in several stations 
through the summer and early autumn. 
10. Myxonema glomeratum sp. nov. 
Tufts about 8 mm. long, from a dense palmelloid base ; fila- 
ments radiating, bearing few, alternate branches below ; branches 
above alternate or rarely opposite, more or less densely penicillate- 
fasciculate, particularly at the summit, tapering into an acute or 
long setiferous point; cells of main branches 11-14 y in diameter, 
2-7 times as long, cylindrical or slightly swollen, chromatophore 
broadly zonate ; cells of branchlets 6-8 p in diameter, 1-2 times 
as long, chromatophore dense (AL. 34). 
Attached to twigs in a nearly stagnant pool, and in the iron 
basin of a fountain. 
New York: East Chester, May (390, 591); Central Park, 
June (623). 
