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terminal pore. Placenta is hemispherical, lobed or notched on 

 its surface, connected with pericarp by slender sterile filaments, 

 and radiate short spore-filaments from the surface. 



Colour pale- browish red. Substance thin and membranaceous 

 in younger frond, but becoming thicker when old. When fresh, 

 the plant is coriaceous and brittle, but becoming tenaceous after 

 drying. It imperfectly adheres to paper in drying when fully- 

 grown. 



Hab. On rocks between tide marks, often preferring shelter- 

 ed places. Hizen, Tosa, Oshima (Idzu), Sagami, Boshu, Kadzusa, 

 Oki, Noto. Pretty common along the both coasts of warmer 

 part of this country. Fruits ― Summer. 



Plate XXIII. Fig. I ： sterile frond of Gracilaria Textom, 

 in nat. state and size. ― Fig. 2 : cystocarpic frond, \. ― Fig. 3 ： 

 portion of the cross-section of tetrasporic frond, highly magnified. 

 — Fig. 4 ： longitudinal section of cystocarp, -?、 



