S. daedalea Lagerheim.
This species has recently been found in a pond south of Coffeen, Ill. The spores show the characteristic markings and the dimensions are near those of the original collection. The spores are slightly more rhomboidal than in the type material, which I have seen. In herb. E. N. T. Collection No. 2912, 2850.
S. Goetzei Schmidle.
This species previously known only from the tropics has been found in the collection of Mr. Charles Bullard, from Wellfleet, Mass. In herb. E. N. T. Collection No. 2954.
S. submarina (Collins) nov. comb.
This species was described by Collins as a variety of S. decimina (Müller) Kütz, which it somewhat resembles in the form of the vegetative cells. The spores, however, are distinctly ellipsoid, while those of S. decimina are ovoid. The dimensions are much smaller than those of S. decimina. It seems better therefore to recognize this as a distinct species. It has been collected in Massachusetts, Connecticut and Bermuda.
E. ellipsospora Transeau.
Described originally from Illinois, I have seen specimens during the past year from Maine, Massachusetts and Minnesota. Professor G. S. West[F] described about the same time a species from Columbia, South America, which appears to be a form of this same species. The vegetative cells are considerably larger, the chromatophores are six (or five) in number, and the spores are at the upper limit of size of the North American form. As our specimens all show, a wider range of dimensions and number of chromatophores, the South American form is best classified as a variety under the name S. ellipsospora var. splendida (G. S. West) nov. comb.
S. propria nov. sp.
Cellulis vegetativis 60-68µ × 80-150µ, dissepimentis planis; chromatophoris 3, anfractibus arctis .5-1; cellulis fructiferis cylindricis; zygosporis ellipticis 42-60µ × 80-120µ; membrana media sporarum scrobiculis irregularis ornata, luteo-brunnea.