﻿PLATE I. 

 Yatabella Gen. Nov. 



i GELIDIACE/E. 



Yatabella : Frond filiform, growing in monopodial manner, 

 irregualrly branched, consisting of two layers of cells ； the inner, 

 of larger, elongated cells, surrounded by very numerous and 

 densely packed slender, lonpitudinally runninp- filaments, covered 

 by a few layers of smaller, roundish, cortical cells. Bandies 

 closely imbricated with multifid-echinate ramuli. Sporophylls 

 produced from the prolongation of spines of ramuli. Tetraspores 

 roundish and cruciately divided, being lodged among cortical cells 

 of roundish, shortly stipitate sporophylls. Cysto carps binocular. 



Yatabella hirsuta Sp. 磨. 



NOM, JAP, Yatabc-gusa. 



Diap-JL •• Frond filiform, primarily erect, subsequently de- 

 cumbent, irregularly branched. Branches closely set on all sides 

 with multidd echinate, peltate ramuli, adhering to any object 

 coming in contact with the frond. 1 etraspores collected in an 

 irregularly roundish, shortly stipitate sporophylls. , Cystocarps 

 globualr, with or without apical prominence, shortly stipitate. 



Hab. On rocks and stones at the depth of 8-9 fathoms ； 

 Hiup-a and ivao-oshinia-prefecture. 



Descr. Root a small disc with nbres. Fronds single or tufted, 

 15-20 cm. high, branching from base without any definite order. 



PI. I-V. Nov., 1900. 



