Spirotaenia bryophila (Bréb.) Lütkemüller

“ 10. 'SPIROTÆNIA BRYOPHILA.ia.a.]

SPIROTABJTIà BEYOPHILÂ (BBEB.Ï RÂBEÏÏHOBST. - Fresh-water Algae of the
United States page 18» February 1872. (Smithsonia contribution to
knowledge, 241).

Sp. mimina, bryophila; oellulis in felatlna matrioali consooiatia,
oblongo-cylindricis, reotie vel Bubourvatie, bie velnter longiorbus
quam latis, utroque polo rotundatis; lamina ehlorphyllaoea
singula anfractu 1-2&.

Diam.-l/sOOO" - .00033" (O.OOOE^-.OCXÏSa"* B*)

Syn.-Spirotaenia bryophila, (Bréb.) RâBENHORST, Flora Europ. Àlgarum,
Sect III. p. 146.

Hab.- Prope Philadelphia; Wood.

"(S. muscicola (Be 3ary)) Frond cylindrical two to four times as
long as broad, ends rounded; endoohrome a single, broad,
smoothly defined, widely wound spiral band, its revolutions
very few (one or two)." (A.)

B3MARKS.- I found this beautiful little desmid on the North Pennsyl-
vania Railroad, near Chelten Hills, growing amongst some mosses
which were kept constantly wet by overhanging dripping rocks. It
formed little transparent masses of almost colorless jelly
looking much like drops of dew. It agrees well with the de-
scriptions of the European form, exoept that there were gener-
ally from 2-2& truns of the spiral, and the cells exceed some-
what the measurements of Prof. Babenhorst. The Cells are
closely placed in the jelly.

Fig. 10, pi. 12, represents some plants of this species*

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