. Dansk botanisk arkiv. Plants; Plants -- Denmark. filaments consist of very long, nearly cy- lindrical cells (comp. Fig. 128) about 120^« broad and about ten times as long; these cells are thickest near the base, taper slowly upwards growing somewhat thicker again at their uppermost ends and have rather thick walls. At the upper end these long cells carry a whorl of branchlets. These are repeatedly subdichotomously ramified growing evenly thinner towards their apices which end in a single or, usually two, seldom three short conical cells (Fig. 129). From the basal cells of the branchlets seve
. Dansk botanisk arkiv. Plants; Plants -- Denmark. filaments consist of very long, nearly cy- lindrical cells (comp. Fig. 128) about 120^« broad and about ten times as long; these cells are thickest near the base, taper slowly upwards growing somewhat thicker again at their uppermost ends and have rather thick walls. At the upper end these long cells carry a whorl of branchlets. These are repeatedly subdichotomously ramified growing evenly thinner towards their apices which end in a single or, usually two, seldom three short conical cells (Fig. 129). From the basal cells of the branchlets several ramified filaments grow out, some upwards some downwards, bending themselves round the large cells of the principal branches (Fig. 128). In the upper parts of the branches where the cells are shorter they often cover the whole cell (Fig. 130) while in the older parts it is only the upper and lower parts which they surround. As a rule those filaments lie quite loose round the cell (compare Fig. 128). The branchlets are as is commonly the the case in Wrangelia crowded together in the upper, young ends of the branches, lower down the whorls of branchlets are more distant in accordance with the lengthening of the large central cells. In the lowermost part of the branches the branchlets fall off. Compared with Wrangelia Argus our plant reminds of this species as to its loose cortical layer but differs from it in its much larger and more loosely constructed thallus and further by the bicuspidate ends of the branchlets. And Wrangelia penicillata especially differs from this species by its continuous cortical layer in the principal filaments, by the blunt ends of the branchlets, by its much larger size etc. Fig. 130. Wrangelia Wrangelia biciispidata has been found in bicuspidata the sublitoral region down to a depth of Part of a young i ^,/^ ^^ branch. (About 80:1). about oO—40 meters. Fig. 129. Wrangelia bicuspidata nov. spec. Apices of branchlet. (About 60 :1).. Plea
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