On the structure of Cystoclonium armatuni, Harv. 



(2) 
along the branches and tapering to both ends. Cystocarps forming a wart like protuberances along 
branches, immersed in the substance of frond, often two together. Tetraspores, oblong zonally Teale, 
situated among cortical cellules. 
The Plants having the above-stated characters have a medullary stratum of filaments 
well presented. It consists of filaments loosely and distantly anastomosing and running 
治 胃 
through the whole length of frond. They are thicker and more compact inthe stem in the 
older portion of frond, and are loose and few in younger subulate ramuli. The cortical layer 
consists of two strata of cells; the inner, of large oblong roundish angular colorless 
cells, gradually smaller towards the surface; the outer, of one or two layers of minute 
red celle. The outer cortical cells are smaller than those of American specimens Of 
Cystoclonium purpurascens with which I have compared my plants. The present | 
plant has a wide range of distribution in this country; it grows from Hakodate to 
Kobe, so far as I know. The specimens I have studied are those obtained from 
Matsushima and Kobe but not from Hakodate. In Marten’s Ost. Asien. Tang. p. 108 

eet = 用 一 (年 万 
Cystoclonium armatum is mentioned, which was collected at Yokohama ; and in that book this genus is not mark- 
ed with (?), and some remarks are given of its appearance, hardnes sand fruits, but not about the presence 
of a medullary stratum. In. J. Agardh Sp. alg. vol. III p. 239, on the other hand, this species is in- 

