3°° 



F. BORGESEN 



Fig. 40. Cho7id)-ia repens now spec, part of specimen, c. : " 1. 



Rami repentes ramosi, ramis aut decumbentibus, repentibus, axi primario 

 similibus, aut erectis, curtis, obovatis, simplicibus, ca. V3— 1 mm altis et 300— 

 350 \i. latis, tetrasporangiis instructi. 



Tetrasporangia in superiori parte ramorum sparsa, ca. 80—90 a lata. 



Of this little plant some very few fragments are found only, the longest 



specimen being about I cm long. 



The terete thallus has creeping basal filaments fixed to other algae by means 



of short thick hapters formed by a bundle of rhizoids. From this basal part 



shorter or longer branches are given off. Some of these branches may grow 



out to long shoots like the mother branch fixing themselves to the substratum 



in a similar way but most of the branches remain short, erect and become fertile. 



Gradually they become more or less distinctly clavate and produce tetrasporangia 



in their upper end. The ripe tetrasporangia are about 80 — 90 u. in diameter. 



The cortical layer is rather thick and the central 



strand generally not visible. Seen from above the 



surface cells are roundish to polygonal with rather 



thick walls. 



A transverse section (Fig. 41) shows that the 



thallus is composed of a parenchymatic tissue, the 



central axis not being especially distinct. 



In » Algues du Siboga-, III RhodopJiyceae, p. 349 



Mme. Weber has described a small species Chondria 



minutula, of nearly the same size and habit, but 



otherwise widely different, belonging as it does to 

 Fig. 41. Chondria repens no v. .« t- 1 j : x?„n „ u 



ction of thallus, the § rou P kuchondna Falkenb 



spec. Cross sectic 

 c. ,26 /i. 



Area of distribution: Endemic. 



