— 264 — 



both in shallow and deeper water down 

 to a depth of about 5 fathoms. It is 

 found both in more open but especially 

 in sheltered localities in the shallow 

 areas of sea behind the coral reefs. 

 Here it often occurs loose in the form 

 of œgagropila-\\ke clumps. 



It was found with sporangia in 

 January — March. 



St. Croix: Off Frederikssted, Lt. 

 Princess, the harbour of Christianssted, 

 Long Reef, Gasavagarden. 



Struvea Sond. 



S. elegans nov. spec. 



Struvea, stipite cylindrico, simplici, 

 in basi transverse annulato, superne 

 levi, flabello ovato-subpyramidali coro- 

 nato; rami's flabelli oppositis distiche, 

 plerumque quater pinnatis, apicibus 

 ramorum plerorumque haptens brevibus 

 unicellularibus cellulis proximis adfixis, 

 ramificatione in planta juvenili accura- 

 tissima, in adultiori minus regulari; cel- 

 lula basali rachidis cellulis superioribus 

 3-plo longiori. 



This very nice plant was found 

 rather abundantly in deep water in the 

 sea around St. Jan. In habit and size 

 it comes near to Str. plumosa but shows 

 differences in several ways, having also 

 some likeness with the following species. 



The basal part of the plant consists 

 of decumbent creeping filaments attached 

 to the substratum by means of rhizoids. 

 These rhizoids are very irregularly rami- 

 fied, sometimes quite short, sometimes 

 also longer, irregularly septated. They 

 are richly provided with starch. 



