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



307 



short, clavate and of the same shape as the one often found in 

 the Rhodomelaceæ. 



I have not been able to follow the further development. The 

 mature cystocarp (cp. Fig. 311, the only one found) is lageniform 

 having a rather long neck and a roundish basal part. 



Lophocladia is fixed to the substratum (stones, shells etc. or 

 other algæ) by means of vigorous rhizoids breaking out from the 

 decumbent parts of the filaments (Fig. 312j. These rhizoids are mono- 

 siphonous or plurisiphonous. They end in a disc. From the creeping 



Fig. 312. Lophocladia trichoclados ■ [Mert., C.Ag.) Schmitz. 

 Basal, decumbent part of filaments with rhizoids and larger haptera 



(About 80:1). 



decumbent parts of the filaments the free upper ends bend upwards 

 (comp. Fig. 312) or new erect branches are produced. 



Regarding the hyphæ-like rhizoids, mentioned above, which 

 form the cortical layer, we find that these at their outgrowth are 

 separated from the mother pericentral cell by a wall. By a mistake 

 this wall has been omitted in Fig. 307. 



This plant has apparently given Falkenbeeg much trouble 

 with regard to the trichoblast and the occurrence of the stichidium 

 upon it. While Falkenberg begins his description of this plant by 

 calhngthe trichoblasts "Kurztrieben" (I.e., p. 553) he ends by saying: 

 "Meiner Ansicht nach liegt die Sache nun so, dass wir bei Lophocladia 

 trichoclados echte Blätter haben". And, as to the formation of the 



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