150 



layer on the surface of tlie patches (Figs. 119 and 120), as is de- 

 scribed by SvEDELius p. 120 and as I have already myself men- 

 tioned briefly in my paper (Bot. Tidsskr., vol. 23, 1900, p. 51). 





*^.Vv 



Fig. 120. Cmderpa racemosa (Forsk.) Weber-van Bosse var. davifera (Turner) 



Weber-van Bosse. From Longreef St. Croix). Creeping on a dead coral 



and intermingled with a Corallinacea. (About 1:1). 



Fig. 121. Caulerpo racemosa iForsk.l Weber van Bosse var. clavijera ( Turner i 



Weber-van Bosse. A form approacliing forma reducui. 

 From the reef between the Hurricane Island end St. Thomas, i About 1:1). 



The locality gradually becoming more exposed the erect shoots 

 grow shorter and shorter and tlie plant on the whole smaller. As 

 the assimilators often consist only of a single raniulus and are at 



