116 



26 (partim). Iridaea edulis Harv. Phyc. Brit. pi. 97 ? Kg. Tab. Phyc. 

 XVII, t. 3. f. a-c.Sarcopliyllis lobata Kg. Tab. Phyc. XVII, t. 97, f. 

 a-c. Schizymenia edulis J. Ag. Sp. Alg. II, p. 172. Sarcophyllis edulis 

 J. Ag. Epicr. p. 265 ; Kjellm. Alg. Aret. Sea p. 125. 



Fronds tufted rising from a small scutate disc, broadly membranous, 

 gradually tapering below into cuneate base in elongated forms and ab- 

 ruptly in roundish ones, rarely simple and not lobed, assuming oblong, 

 obovate or almost roundish shape, often curved to one side, usually 

 clefted radially into some irregularly cuneate lobes, in some almost 

 palmately lobed. Apices are rarely entire, usually more or less worn 

 away by waves. Frond attains the height of 15-60 cm. and breadth of 

 5-30 cm., and the lobes 3-10 cm. in the bradth of upper broader portion. 

 Margin entire or irregularly crenated. Colour purplish-red, turning to 

 dark red in some fully grown frond. Substance membranaceous, and the 

 plant firmly adheres to paper in drying. 



Hab. : Common along the coasts of Kurile Islands and Hokkaido. 



PI. CLXXX. Fig. 1 : frond of Dilsea edulis Stackh., j. Fig. 2 : 

 another form of frond, shown in the outline, -J-. Fig. 3 : portion of the 

 cross-section of frond, showing two auxiliary-cell-branches ; line a a indi- 

 cates the median portion of the section, ^p. Fig. 4 : auxiliary cell branch, 

 ^~. Fig. 5 : portion of the cross-section of frond showing procarp ; 

 line a a indicates the middle portion of the section, ^~. Fig. 6 : tetra- 

 spores in the cross-section of frond, : ^. Fig. 7 : cortical structure, &^p. 



CORRECTION. 



Vol. IV, No. 4, p. 75, 8 lines ; for PL. CLXIV read PL. CLXIX. 

 Vol. IV. No. 5, Wrapper : for No. IV (PL. CLXVI-CLXX) read 



No. V (PL. CLXXI-CLXXV). 



