THK CEYLON SPECIES OF (!AIILEKPA. 



KJ!) 



20.— CAULERPA SEDOIDES (R. Bkown) C. Auakuh. 



C. AcJABDH, Spec. Algai-uin, p. 438. 

 J. G. Agardh, Till. Algernes. Systeraatik 1., p. .39. 

 Weber v. Bosse, Monographie des Caulerpes, p. 387. 

 f. crassicaulis, J. G. Agaedh, loc cit. p. 40. 



f . mixta. In all respects smaller and weaker. The horizontal axis about 1 mm. in 



diameter. The vesicles (branchlets), -5 to 2 mm., commonly 1 mm. in 



diameter, of ditferent kinds, viz., (1) sessile or pedunculate with spherical 



tops and evident constrictions; (2) sessile with somewhat pear-formed 



tops ; (3) long, extended, cylindrical. 

 I have found C. sedoides f. crassicaulis in Ceylon in several specimens from Matara, Dondra 

 Head, and Weligama on the south coast (fig. 47). Almost all correspond well with Agardhs's /. crassi- 

 caulis. Thus the vesicles are, as a rule, always spherical, there are no joints on tli« main axis, and 

 the closely set branchlets stick out in all directions around the main axis. But, on the other hand, the 



Fig. 47.— C. sedoides (r. br.) c. ag. /. crassicaulis 



J. G. AG. (1 X 1). 



vesicles are sometimes provided with a very short but distinct stalk (fig. 48), and this seems also to be 

 the case with Agardh's own type-specimens, a character again shown in some high-grown crassicaulis 

 forms (in the Herbarium of the R. Riksmuseum in Stockholm) from Torres Strait (Aug. 1846). Also 

 Weber v. Bosse speaks about (loc. cit. p. 388) a Caulerpa from Upola, in which some branchlets are 



Fig. 48. — O. sedoi'Jes (r. bk.) 

 c. AG. /. crassicaulis 



3. G. AG. (2 X 1). 



Fig. 49. — C. sedoides (r. bb.) 



c. AG. /. mixta n. /. 



(1 X 1). 



Fig. 50. — C. sedoides (r. br.) 



c. AG. /. mixta n. f. 



(2 X 1). 



pedunculate, reminding one almost of C, racemosa v. clavifera, from which it is however distinct by its 

 constriction. Both in Matara and Weligama the /. crassicaulis showed itself very uniform and scarcely 

 variable and gave the impression of being a distinct race. 



