F. Børgesen: Rhodophyceæ of the Danish W. Indies. 



339 



Pacific form at my dis- 

 posal because the ones 

 collected by Liebman 

 most probably have 



been kept in J. 

 Agardh's Herbarium 

 in Lund, 1 have not 

 been able to compare 

 the two plants, but lam 

 most inclined to think 

 that BoRNET is right. 



The structure of 

 this plant has been 

 examined by Falken- 

 berg, 1. c. 



In its way of grow- 

 ing it bears a close 

 resemblance to Herposi- 

 phonia tenella having 

 a creeping, prostrate 

 main stem with indefi- 

 nite growth from which 

 erect branches arise 

 (Fig. 337 a). The main 

 stem is terete and a 



transverse section 

 shows four pericentral 

 cells. From its ventral 

 side rhizoids are issued 

 downwards ; these often 

 have a long stalk with 

 no walls or a few 

 ones, ending in a small 

 more or less lobed disc. 



On its dorsal side 

 the main stem carries 

 more or less ramified 

 branches with definite 

 growi/h and placed in 



Fig. 337. Tænioma perpusillum J. Ag. 

 part of a plant, b, upper part of the flat 

 branchlet with basal part of the hairs. 

 [a, about 30:1, b, 270:1). 



22* 



