149 



tween the typical var. uQijera and var. clavijera (see my Figs. 

 118 and 119) and is, at least the West Indian form, connected 

 by numerous intermediate forms to the var. dcwijera. Any flat- 

 tening of the ramuli as mentioned by M™'^ Weber-van Bosse 

 and also found by Svedelius who gives this form the name 

 planiuscula I have never seen in the Danish West Indies. 





'.'■^y 







'^'^i 



s. 



' /■-■ 





^ 



Fig. 119. Cctulerpa racemosa Forsk.) Weber-van Bosse var. davifera (Turner) 

 Weber-van Bosse. Growing on flat cliffs in the bay behind Christiansfort 



(St. Jan). F. B. fot. 



Var. clmnjera is characterized by shorter erect shoots and 

 especially by the fact that these have fewer ramuli. In somewhat 

 exposed localities it often forms on rocks and coral-reefs large flat 

 tufts, which on the upper side consist of the densely placed, grape- 

 like, short, erect shoots, on the downward side of the close tissue 

 of the rhizomes, which twisted and entangled together form the 

 underside of the tufts and by means of numerous, finely ramified 

 rhizoids are firmly fastened to the substratum. The grape- 

 like assimilators are thus put together nearly in a horizontal 



