. Ecological and systematic studies of the Ceylon species of Caulerpa . Fig. 18.—C. corynephora mont. /. complanata ( ag.) w. v. b. (I X 1). Geographical Tropical Coasts of Australia. 12.—CAULERPA L^TEVIRENS, Montagne. Syn. Catderpa racemosa var. Icetevirens, Weber v. Bosse, Monographie des Caulerpes, p. 366. f. laxa (Greville). Weber v. Bosse, loc. cit. p. 367. Greville, Remarks on some Algse bel. to the Gen. Caulerpa, PI. II., figs. 1, 2. Ann. and Magazine of Nat. Hist., vol. XII, sec. ser. (1853). Caulerpa laxa, Grev. Murray, Catalogue p. 38. Exsicc. Harvey, Ceylon Algae
. Ecological and systematic studies of the Ceylon species of Caulerpa . Fig. 18.—C. corynephora mont. /. complanata ( ag.) w. v. b. (I X 1). Geographical Tropical Coasts of Australia. 12.—CAULERPA L^TEVIRENS, Montagne. Syn. Catderpa racemosa var. Icetevirens, Weber v. Bosse, Monographie des Caulerpes, p. 366. f. laxa (Greville). Weber v. Bosse, loc. cit. p. 367. Greville, Remarks on some Algse bel. to the Gen. Caulerpa, PI. II., figs. 1, 2. Ann. and Magazine of Nat. Hist., vol. XII, sec. ser. (1853). Caulerpa laxa, Grev. Murray, Catalogue p. 38. Exsicc. Harvey, Ceylon Algae No. 64. f. depauperata. In all respects very slender and weak, smaller than any other forms; it is most nearly alHed to /. laxa, of which it is probably to be considered a dwarf form (fig. 20). f. CSepitOSa. Branchlets swollen up, rigid, cyHndrical, or somewhat clavate, the vertical axis short, not above 15 mm. in height and the whole plant firmly and closely tufted with very rigid branchlets rather closely pressed together (figs, 21, 22)- C. laetevirens is perhaps one of the rarest Caulerpa forms in Ceylon. I have only observed it at Galle (/. laxa, caespitosa, and depauperata) and Weligama (/. laxa) on the south coast, and only at the first-mentioned place in any great quantity, forming a distinct association. At Galle it grows on the ledges north of Victoria Park ; there it constitutes by itself almost the whole vegetation in locahties strongly exposed to swells, where the slender assimilators swing to and fro in the waves. In its organization it also shows adaptations to such a mode of life. The rhizome (fig. 19 a) or the creeping horizontal axis is relatively strongly developed, and very long, witii numerous closely set
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