An Ecological and Taxonomic Study of the Algae of British Solis

Crinalium epipsammum sp. nov.: a filamentous cyanobacterium with trichomes composed of elliptical cells and containing poly- -(1,4) glucar (cellulose)

“…C. magnum was reported to possess very broad trichomes (up to 18 pm), whereas the broad side of our strain never exceeds 7 ym. Although the new isolate does not entirely fit either the description of C. endophyticum (Crow, 1927) or that of C. magnum (Fritsch & John, 1942), we feel confident that the generic assignment to Crinalium is justified, and propose to assign the organism to the new species, C. epipsammum. However, it should be pointed out that C. epipsammum shares certain properties with strains of Oscillatoria, i.e.…”

“…This property does not apply to C. epipsammum, whose crosswalls are readily visible even without staining procedures. Thus, it shares more properties with a second species, C. magnum, described by Fritsch & John (1942), in which cross-walls were also clearly visible and which was placed into the genus Crinalium solely on the basis of its elliptical trichomes. However, the description of C. magnum by Fritsch & John (1942) does not fit C. epipsammum with respect to size.…”

“…Thus, it shares more properties with a second species, C. magnum, described by Fritsch & John (1942), in which cross-walls were also clearly visible and which was placed into the genus Crinalium solely on the basis of its elliptical trichomes. However, the description of C. magnum by Fritsch & John (1942) does not fit C. epipsammum with respect to size. C. magnum was reported to possess very broad trichomes (up to 18 pm), whereas the broad side of our strain never exceeds 7 ym.…”

Observations on Soil Algae

“…6 L-N (Van Heurck, 1880-5, 1899tleve, 1894-5, andHustedt, 1930, 4-8/i 1.;2-5/M br.). I have not observed any of the larger specimens of Petersen (1915Petersen ( , 1928 and Fritsch & John (1942) which reached 14/x 1. and 7/n br. These may belong to TV.…”

Observations on Soil Algae

“…THE SPECIES GerlofT (1940) has tabulated and given a key to some 300 species and states that many newspecies are to be found in the soil, several of which he describes. Fritsch & John (1942) likewise found several species in soil. In some cases, species found in cultures may not be true soil algae since they occur with well-known aquatic Volvocales (e.g.…”