39 



in basal portion of frond and in ramuli ; node neither constricted nor 

 prominent. The cortical cells consist of two layers ; the inner, of 

 larger roundish cells, while the outer, of a few layers of smaller cells. 

 Substance thick cartilaginous and tough. Color blood-red or purplish 

 red. 



Remarks. Ceramium japonicum may be referred, according to 

 J. Agardh's Epicrisis, to the section Fennatce, under which a few 

 species are included, namely G. pennatum Crouan, G. pnsillum Harv., 

 G. cancellation Ag. and G. apiculatum J. Ag. G. cancellation and G. 

 apiculatum show no relationship to the present species, having com- 

 pressed disticho-pinnate frond and dichotomo-subcorymbose pinnules ; 

 G. pennatum also differs from it in having forcipated pinnules. G. 

 pusillum seems to present some relations with it, as I judge from the 

 description given in J. Ag's. Sp. Alg. II. p. 104. It differs, however, 

 from the present plant being much shorter in statue and having 

 subdistichous, corymboso-fastigiate branches. 



Botanical Laboratory of Dai-shi-Koto-Grakko, 

 Kanazawa, Japan ; March 9, 1896. 



EXPLANATION OF FIGURES IN PLATE III. 

 I. Caiiophyllis crispata, sp. nov. 



Fig. 1. A small sterile frond; nat. size. 

 „ 2. A portion of margin bearing cystocarps ; ^*. 



II. Plocamium ovicornis, sp. nov. 



Fig. 3. A terminal portion of a sterile frond; \ 7 . 

 5 , 4. A portion of branch bearing stichidia ; 3 T 7 . 

 „ 4a. A stichidia; 8 T 5 . 



III. Delesseria radicosa. sp. nov. 



Fig. 5. Two forms of plant ; nat. size. 

 „ 6. A marginal root-like process ; 5 T °. 

 „ 7. A cross-section of the secondary filiform portion ; J- 7 ^. 



