﻿PLATE XVI. 



Erythrocolon Muelleri (Sond.) J. Ag. 



RHODYMENIACE/E. 



Nom. Jap, ： Fukuro-tsiinagi. 



Erythrocolon Muelleri J. Ag. Anal. Algolog. Cont., Ill, (1896), p. 90 ； 

 De Tom Syll. Alg., Vol. IV, p. ^.—Chylocladia Mtielleri Harv. Phyc. 

 Austr., (i860), tab. 138 ； J. Ag. Epicr., (1876), p. 302. — Cliylocladia ？ valida 

 (Kuetz.) J. Ag. Till Alg. Syst., VI， p. 24. — Lomcntaria valida Kuetz. Tab. 

 Phyc, Vol. XV， (1865), p. 30， t. 85. 



Frond single or caespitose, erect, rising from a common 

 scutate disc, branching in a somewhat trichotomous manner, and 

 by constrictions it is divided into joint-like, cylindrical or oblong- 

 internodes, attaining the lenpth of 30-40 cm. when fully grown. 

 Branches patent, more or less trichotomous ; every internode 

 generally giving birth at its summit to three similar ones, some- 

 times more numerous, sometimes fewer. Proliferous branches also 

 arise (more or less densely) on all sides from several portions of 

 internode, from the middle as well as from the filiform neck which 

 connects .two internodes. All the internodes are separated by 

 slender solid filiform nodes or isthmus, about 1-1.5 mm. long. 

 The lowest joints are clavate or oblong, gradually or abruptly 

 tapering into short, solid, cartilaginous stem. The middle are the 

 longest, cylindrical or oblonp", gradually becoming shorter and 

 shorter above, and almost elliptical in terminal ones, with the 

 diameter 3-10 mm. in the broadest part. Their length varies 

 according to the position ； those of the median portion are often 



PI. XYI-XX, July, 1901. 



