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



79 



Fig. 84. Liagora rnega- 

 gyna nov. spec. 



Transverse section of 



medullary layer. 



(About 60:]). 



merits are about 19 — 20// thick and 30 — 35 ^u long. The whole 

 fascicle reaches a length of up to 500 — 600//. 



Peculiar hairlike organs arise everywhere in the filaments 

 (comp. Fig. 83 a, c, d). These are short, con- 

 sisting of a single cell only, or longer, some- 

 times ramified, and composed of cyhndrical 

 cells whose diameter is 5 — 8«. The upper- 

 most cells in these filaments are almost en- 

 tirely filled with protoplasm ; whatever the 

 reason may be the whole contents are often 

 evacuated from the cells and found mostly 

 as a spherical but sometimes also more irre- 

 gularly shaped body at the end of the fila- 

 ments (Fig. 83 c). Something quite similar 

 often takes place also in the cells at the summit of the assimi- 

 lating filaments ; here also now and then the whole contents of 



the cells are emptied through 

 a hole in the top of the cell ; 

 remnants of a membrane 

 originating from such emp- 

 tied cells are often found 

 in the end of the assimila- 

 ting filaments (Fig. 83 e). 

 Here also short hairs are 

 often found (Fig. 83 /, g), 

 reminding one of those which 

 RosENViNGE has found in 

 Nemalion. They are entirely 

 filled with protoplasm ; when 

 they die remnants of the 

 walls remain at the end of 

 the cell. 



The central filaments 

 consist of long subcylindrical 

 barrelshaped cells, whose 



. .^. .... Liagora niegagyna nov. spec. diameter reaches a length 

 Development of the cystocarp (comp. of 100 — 160// or even more 

 the text), (a, bM 160 : 1, c about ^^^^p_ ^^^ g3 ^^ ^^y ^j^^^g 



and between these thicker 

 filaments smaller ones run irregularly in the mucilage ; they ori- 

 ginate from the basal cell in the peripheral filaments and consist 

 of long cylindric cells about 150/« long and 11// broad. Fig. 84 

 shows a transverse section of the medullary layer. 



Fig. 85 



