SPH^ROCOCCOIDE^. 145 



two kinds on different plants : — 1, necklace-like threads of 

 spores, springing in dense tufts from an elevated basal pla- 

 centa in stalkless conceptacles on the marginal processes of 

 the frond ; 2, zonate or tripartite tetraspores embedded 

 among the surface cells. — Callibiephaeis, from the Greek 

 halos, beautiful, and hlepharis, an eye-lash. 



Calliblepharis ciliata. The ciliate Calli- 

 blepharis. 



Frond six to twelve inches long, rising from a short, cylin- 

 drical stem, with a branching, fibrous root ; substance crisp, 

 rigid, the surface of the frond sometimes smooth, sometimes 

 covered with cilia. In some specimens the frond consists of 

 a simple lance-shaped leaf, with awl-shaped processes on its 

 margin ; in others the main frond is variously cleft, and fur- 

 nished at the edges with lance-shaped segments, from whose 

 margins issue similar processes, which are sometimes pro- 

 longed into lobes. Spores in conceptacles, lodged in the 

 marginal processes ; tetraspores collected in cloud-like 

 patches in various parts of the frond. 



This plantj better known to the marine botanist by its 

 old name Rhodymenia ciliata, has been transferred to 

 its present position, on account of the structure of its 

 spore nucleus and the zonate division of the tetraspores. 

 It is found on all our coasts from north to south, and 

 fruits in winter. 



Calliblepharis jubata. The cirrhose Calli- 

 blepharis. 



Fronds tufted, rising with a cylindrical stem from a root 

 composed of densely-matted, branching fibres ; branches 

 irregularly pinnate, of very variable form, clothed through- 

 out with filiform cilia, which in some specimens are pro- 

 duced into tendrils three to six inches long, and generally 



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