Ecological and systematic studies of Ecological and systematic studies of the Ceylon species of Caulerpa ecologicalsystem00unse Year: 1906 THE CEYLON SPECIES OF CAULERPA. 129 discovery of some transition forms between two Catderfa types need not necessarily result in the union of these species. C. dichotoma has a different mode of growth to G. loetevirens f. laxa, for the former does not occur on rocks in very exposed locahties, and the latter does. C. dichotoma is only to be found on sandy bottoms in somewhat deeper parts of the httoral zone. Oeographical distribution.—Ceylon : Weligama (at
Ecological and systematic studies of Ecological and systematic studies of the Ceylon species of Caulerpa ecologicalsystem00unse Year: 1906 THE CEYLON SPECIES OF CAULERPA. 129 discovery of some transition forms between two Catderfa types need not necessarily result in the union of these species. C. dichotoma has a different mode of growth to G. loetevirens f. laxa, for the former does not occur on rocks in very exposed locahties, and the latter does. C. dichotoma is only to be found on sandy bottoms in somewhat deeper parts of the httoral zone. Oeographical distribution.—Ceylon : Weligama (at a depth of about 1 to 2 m.) ! 14.—CAULERPA CHEMNITZIA (Esper) Lamouroux. J. G. Agardh, Till. Algernes Systematik, I., p. 36. Syn. C. racemosa var. Chemnitzia. Weber v. Bosse, Monographic des Caulerpes, p. 370. Few Caulerpas, as far as their definition goes, maybe said to be more difficult to diagnose than C. Chemnitzia. It is really indisputable that the opinion—in the main—of the position of this form, as expressed by Weber v. Bosse, is right: it is to be considered as a transition form between C. racemosa (Weber v. Bosse sens, lat.) and C. peltata. Its distinguishing character is that, as a rule, it has branchlets of different kinds, viz., partly cyUndrical ones at the base of the vertical axis, and partly, higher up, such as slowly increase in breadth and are nearly trumpet-shaped. Pigs. 264and 27 show pictures of some which I consider to belong to typical C. Chemnitzia. Fi g. 26.—C. Chemnitzia (ESP.) LAM. (1 X 1).
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