184 
plasmate initio: homogeneo, flavo-viridi, postea granulato, fusces- 
cente. Cellul. .o004”-0005”; fam. ad. 004”. 
On culms of Sagittaria. 
22. Zonotrichia, I. Ag—Z. haematites, Rabenh. Stones, Sus- 
quehanna River.—Z. paradoxa, Wolle. This is the same species 
described last year, but with evidence of fructification by spherical 
spores; these form about the middle of the trichoma; in size they 
fill the diameter of the sheath and when matured are ejected spate 
the open, broken-off end of it. 
23. Mastigothrix, Ktz.—M. aeruginea, Ktz. 
M. turgida, n. sp. M. flagelliformis, plus minus distincte articu- 
lata; articulis plantae novae in partibus basim proximis diametro 
aequalibus; aetate provectae 3-4-plo brevioribus; apice piliformi, 
achroa, hyalina, cuspidata, cellulis elongatis, diametro 4-6-plo longi- 
oribus; basi turgida, saepius curvata ; trichomatibus initio aerugineo, 
deinde violis vel flavis; cellulis perdurantibus, fulvo-fuscescen- 
tibus, compresso-globosis vel concavo-convexis. Basis diam. .co06”— 
.0008”, 
Scattered, or in small clusters, in gelatinous coatings on sub- 
merged timbers. 
24. Amphithrix, Ktz.—A. villosa, Ktz. River stones. 
25. Mastigonema, Schwabe.—M. paradoxum, Ktz. Wet sides 
of wooden water box. 
26. Scytonema, Ag.—Sc. tomentosum, Ktz. Wet rocks, Haver- 
straw, N. Y. (C. F. A.)—Sc. cinereum, Menegh. Goodwinville, 
N. J. (C. F. A.)—Sc. Naegelii, Ktz. Dry rocks, Goodwinville, 
N. J. (C. F. A.)—Sc. gracile, Ktz. Wet mountain cliffs—Sc. 
Castelli, Massal. Abundant on moist wood, flower pots, etc., in 
greenhouse, Harrisburgh. 
Sc. Brandeget, n. sp. Sc. tupicola, fusco- atrum, strato firmo ; 
filamentis validissimis, dense intricatis ; pseudoramulis plerumque 
geminis, elongatis, apicibus dilutioribus, pellucidis, dimidio circiter 
tenuioribus quam filamentis, ad apicem haud attenuatis, obtuso-rotun- 
datis ; trichomatibus sordide aerugineis, granulosis, distincte artic- 
ulatis; articulis diametro subaequalibus, nonnumquam 2-3-plo brevi- 
oribus, saepe moniliformibus ; vaginis crassis, distincte lamellosis, 
-aureo-fuscis, saepe apertis, trichomata superantibus ; cellulis 
perdurantibus, interjectis, oblongis vel compresso-sphaericis. Diam. 
trich. cum. vag. .0015”’—.0016”. 
This is the largest of the Scytonemas hitherto discovered. It 
looks akin to Sc. Hegetschweileri, Itz., Sc. tolypotrichoides, Ktz., 
and Sc. cataracta, Wood, but beside being much thicker, it differs 
from each in a number of features. Wet rocks, Colo. (T.S. B.) 
Sc. badium,n.sp. Scy. strato tenui, fuscescenti, badio ; filamentis 
suberectis,” adpressis, brevibus ; pseudoramulis flaccidis, divaricatis, 
singulis vel geminis ; trichomatibus initio dilute aerugineis, modo 
continuis, modo distincte articulatis, .c0008”—.0001” diam., articulis 
subaequalibus; vaginis amplis luteolo-olivaceis, .00016"’= —.0003"; 
cellulis perdurantibus interjectis vel basliaribus, subglobosis vel 
oblongis. Old wood, Herkimer Co., N.Y. (C. F. A.) 
This plant has somewhat of an indefinite character, not unlike 
