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12. Myxonema stagnatile sp. nov. 
Floccose, floating ; filaments somewhat elongated, bearing at 
widely separated intervals, solitary or opposite branchlets, which 
are short, thorn-like, often curved, tapering to a sharp point or 
attenuate into a long seta; cells 8-1 1 ۸ in diameter, 1—3 times as 
long (occasionally one or two cells above the point of branching, 
each a length of 6 times the diameter); branchlets 7-9 م‎ in di- 
ameter at the base )۸/ 36, f. 1, 2). 
Floating in confervoid masses in pools and ponds. 
rs: Melrose, April, 1901 (553), May, 1902 (676). 
New York: Williamsbridge, April (292). 
This form resembles .SZgeoclomium protensum as represented 
by Thuret and some others, but most authors describe that species 
as larger and having long drawn out branches, a characterization 
which corresponds more closely to Dillwyn's species. 
13. Myxonema subsecundum (Kütz.) 
Conferva subsecunda Kitz. Ale Dec. 746. 1836. 
Stigeoclontum subsecundum Kitz. Phyc. Gen. 253. 1843; Spec. 
Ale 352. 1849; Tab. Phyc. 3: M. z. f. 2. 1853. Rabenh. Flor. 
Eur Alc 3: 376. 1868. Wolle, P W. Ale. 112. 2 99. 
کر‎ 2 tBS7. (D 
Filaments elongated, about 16 x (12—18 £) in diameter; very 
sparsely branched below, branches never opposite; cells cylin- 
drical, very slightly constricted at the dissepiments, 3-10 times 
as long as the diameter ; some branches elongated with cells of the 
same character as those of the main filament, others shorter with 
cells 2-3 times the diameter ; branches attenuated toward the apex 
(Pl. 36 f. 3). 
Pleasantville, New Jersey, May 15, 1891 (F. S. Collins). 
“Collected by H. W. Ravenel in rice field ditches, South Caro- 
lina.” F. Wolle. 
DOUBTFUL FORMS 
STIGEOCLONIUM NUDIUSCULUM Kitz. Tab. Phyc. 3: 4. pl ۰ 
Za pl. 16. f. ı. 1853. Rabenh. Flor. Eur. Ale 3: 380. 1868. 
Wolle, F. W. Ale. 113. pf. 98. f. 1,2. 1887. 
Draparnaldia nudiuscula Kutz. Phyc. Germ. 231. 1845. 
