21 



ments are about 65 ,« ; the 

 youngest thinnest ramuli 

 are only about 35 /^. The 

 ramuli are often hooked 

 (Fig. 10). 



The ramification is 

 di-trichotomous, in the 

 youngest ramification of- 

 ten secund. 



Found only once in rather 

 sheltered places in shallow water 

 near the shore. St. Croix: 

 Lime Tree Bay. 



2. Cladophora corallicola 



nov. spec. 



Cladophora pul vinato- 

 caespitosa, filamentis de- 

 cumbentibus substrato 



Fig. 10. Cladophora 



uncinaia nov spec. 



Branch with hooked 



ramuli. (About 16 : 1) 



Fig. 9. Cladophora immiata nov. spec. 

 Basal part with rhizoids. (About 15 : 1). 



rhizoideis adfixis; cellulis in filamentis cras- 

 sioribus 125 — 150 /j. crassis, diametro 5 — 10 

 plo longioribus, in ramulis tenuioribus ca. 

 70 [J. crassis, diametro 5 — 6 plo longioribus. 

 Cellulis in superiorem partem crassioribus ssepe 

 curvatis, ut undulata filamentorum forma 

 efficiatur. Rhizoideis 45 fJt- crassis. Ramis 

 inferne di-trichotomo ramosis, superne simpli- 

 cibus rarius ramosis. 



This plant was found growing upon dead 

 corals or shells as a low dense cover. The 

 dense growth is due to the fact, that from 

 the decumbent branches erect grow up, some 

 of which again bend down and get fastened 

 to the substratum by means of rhizoids 

 (Fig. 12). 



