. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . Fig. 45. Peridinium multistriatum Kofoid. Dorsal (left figure) and ventral (right figure) viewsof cell, showing very wide striated intercalary bands, x 530 (after Kofoid). In both figuresthe cell-wall is slightly dislocated immediately behind the girdle. and increasing the strength of the union between the plates. The striationsare oblique structures within the wall or on the oblique faces of the over-lapping margins of the plates. They are m
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . Fig. 45. Peridinium multistriatum Kofoid. Dorsal (left figure) and ventral (right figure) viewsof cell, showing very wide striated intercalary bands, x 530 (after Kofoid). In both figuresthe cell-wall is slightly dislocated immediately behind the girdle. and increasing the strength of the union between the plates. The striationsare oblique structures within the wall or on the oblique faces of the over-lapping margins of the plates. They are most probably of the nature ofmodified pores or canals, and are sometimes continued beyond the edgesof the overlapping margins. In some of the marine forms there is an intracellular skeleton consistingof curved rods, five-rayed stars, or perforated basket-like structures (fig. 46 Aand B). In some part of the longitudinal furrow or of the ventral area there is anaperture through the cell-wall known as the flayellar pore, through whichthe two flagella pass as they leave the protoplast. This pore may be cleft-like,round, or oval, and its outer margin
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambridgeengtheuni
