Ecological and systematic studies of the Ceylon species of Caulerpa ecologicalsystem00unse Year: 1906 Fig. 40.—C. imbricata (kjellm.) /. minor n. f. (1 X 1). Fig. 41.—C. imbricata', Fig. 42.—C. imbricata{) (kjellm.) i. ad peltatam. (1 x 1). (1 x 1). It is rather remarkable that variations of C. imbricata are to be found which are quite analogous with C. Chemnitzia. Fig. 42 shows such a form, for which I propose the name mixta. The basal branch- lets are cylindical, about 3 mm. in^ length and only IJ mm. in breadth, and at the apex abruptly cut off, as if truncated, just
Ecological and systematic studies of the Ceylon species of Caulerpa ecologicalsystem00unse Year: 1906 Fig. 40.—C. imbricata (kjellm.) /. minor n. f. (1 X 1). Fig. 41.—C. imbricata', Fig. 42.—C. imbricata{) (kjellm.) i. ad peltatam. (1 x 1). (1 x 1). It is rather remarkable that variations of C. imbricata are to be found which are quite analogous with C. Chemnitzia. Fig. 42 shows such a form, for which I propose the name mixta. The basal branch- lets are cylindical, about 3 mm. in^ length and only IJ mm. in breadth, and at the apex abruptly cut off, as if truncated, just as in Chemnitzia. Somewhat below the middle of the vertical axis commence the typical imbricata branchlets—with the discs sharply defined from the stalk—and continue up towards the apex. This form, however, is not C. Chemnitzia, for the latter has not only basal branches which are cylindrical, but its upper branches increase only slowly in breadth and are almost trumpet-shaped. (^/. fig. 27), and often also the upper branchlets are spherically enlarged as in racemosa. Weber v. BosSE had also placed Chemnitzia under this species, but with the observation that it is an intermediary form between racemosa and peltata. In the form mixta the basal branchlets are cyUndrical as in Chemnitzia, but the upper branchlets are typical imbricata branches. The mode of growth of this form in the upper littoral zone corresponds also in every respect with that of C. imbricata. By reason of C. imbricata in Ceylon seeming to be a form or race equally distinguishable from the remaining peltata forms, as are nummularia and typica (Weber v. Bosse). I think there is little
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