112 



cuneate base, 6-10 cm. high. Segments broadly linear or cuneate, erecto- 

 patent or patent with round axils, 6-10 mm. broad concentrically zonate 

 in short distances, bifid at apices, and proliferating from margins of 

 adult segments. Cystocarfrs ovoid sessile on the surface of frond. Colour 

 purplish-red. Substance membranaceous and the plant firmly adheres 

 to paper in drying. 



Hab. : On rocks about 8 fathoms deep below the tide marks at 

 Misaki (K. Imamura) ; Choshi, Wagu. 



PI. CLXXVIII, Fig. 1-7. Fig. 1 : frond of Cfiampia expanse. Yendo.i. 

 Fig. 2 ; cross-section of frond, ^-p. Fig. 3 : surface view of frond, 

 22.. Fig. 4 : longitudinal section of frond through a dissepiment, ^p. 

 Fig. 5 : portion of frond bearing cystocarps, . Fig. 6 : cystocarp, -^-. 

 Fig. 7 : vertical section of cystocarp, -^~-. 



Ceramium tenerrimuin (Mart.) Okam. 



Norn. Jap. : Ke-igistt. 

 PL CLXXIX, Fig. 1-7. 



Hornirjceras teiicrrimum Mart. Tange Preuss. Exped. nach Ost-Asien p. 

 146, t. VIII, f. 2. Hormocerus fla:ciJum (non Harv.) Sur. Alg. Jap. 

 Mus. bot. Lugd.-Bat. 1870, p. 28, Tab. XIII. Ceramium gracillimum Griff, et 

 Harv. ; De Toni Syll. Alg. IV, p. 1483, (partim) ; Okam. Nippon Sorui- 

 meii (2nd. edit.) p. 98; Okam. Alg. Jap. Exsic., fasc. I, n. 28. 



Fronds densely caespitose, very fine and capillary, 60-80 ft thick, very 

 flaccid, deliquescently dichotomo-fastigiate, forming almost globular mass, 



