. Botanisk tidsskrift. Botany; Plants; Plants. — 244 — in alcohol; judging from this alone I would have been most inclined to consider them as forms or varieties of the same species only. I have found this species growing in rather exposed localities in shallow water and in deep water at a depth of about 30 meters. It is found: St. Croix, at White Bay; St. Jan, off Cruz Bay. Valonia utricularis (Roth) Ag. G. Agardh, Species Algarum, , p. 431. J. Agardh, Till Algernes Systematik, VIII, p. 98. P. Kuckuck, Über den Bau und die Fortpflanzung von Halicystis Aresen, und Valonia Ginn. (Bot. Zeit
. Botanisk tidsskrift. Botany; Plants; Plants. — 244 — in alcohol; judging from this alone I would have been most inclined to consider them as forms or varieties of the same species only. I have found this species growing in rather exposed localities in shallow water and in deep water at a depth of about 30 meters. It is found: St. Croix, at White Bay; St. Jan, off Cruz Bay. Valonia utricularis (Roth) Ag. G. Agardh, Species Algarum, , p. 431. J. Agardh, Till Algernes Systematik, VIII, p. 98. P. Kuckuck, Über den Bau und die Fortpflanzung von Halicystis Aresen, und Valonia Ginn. (Bot. Zeit. 1907). Conferva utricularis Roth, Gat. I, p. 160, tab. 1, fig. 1, Gat. II, p. 187. forma typica Kuck. 1. c. forma Crustacea Kuck. 1. c. The forms I have referred to this species seem to agree very well with those described by Kuckuck, 1. c. In the forms which occur on exposed places, the small lens-shaped cells were present in great number. They occurred not only in the basal part of those cells by which the plant is fastened to the substra- tum, but also in other parts of the cells, especially in the furrow where the cells meet each other. Here we often find a dense row of these small cells on both sides of the wall and as these small lenticular cells often bear short rhizoids which attach them- selves to the neighbour cell they con- tribute to the firmness of the cell- complex, making it more resistant to the beating of the waves. Fig. 2 shows a plant of the form I have referred to var. Crustacea and fig. 3 a little part of it more magnified. The arrangement of the lens-cells and the manner in which the rhizoids, growing out from the small cells, attach them- selves to the neighbouring cells reminds one in a striking way of Dictyosphœria favulosa, a plant I also consider very nearly related to Valonia, as will be mentioned later Fig. 2. Valonia utricularis (Roth) Ag. forma Crustacea Kuck. (about 6 :1).. Please note that these images are extracted from scanned pag
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