some wider, others narrower. Margin entire, or slightly wavy. Surface 

 flat or undulated. Leaves are more usually radially lacerated as if eroded* 

 Telrasfrores are unknown to me. Cystocarps almost globular, slightly 

 prominent at apex, with short pedicels, produced on veins or veinlets as 

 well as on intercostal portions of both surfaces. Colour deep purplish 

 red. Sti/'stancc thick membranous, rather soft-leathery, and plant in ajie 

 does not adhere to paper in drying. 



Hub. : Often washed ashore ; east and west coasts of Kabafuto. East 

 coast of Hokkaido, N.E. coast of Chosen. 



PI. CLXV1II. Fig. 1 : smaller fructified frond of Dclcsscrin cnissi- 

 fofia Rupr., J-. Fig. 2: leaf with slenderer veins, }. Fig. 3: leaves 

 proliferating from veins on both surfaces, \. Fig. 4: young leaf. Fig. 

 5 : surface-view of fig. 4, showing the apex of midrib, a, and that of 

 veins, h, />, 3!>0 -. -Fig. 6 : cross-section of a young leaf through a vein (al- 

 coholic specimen), 2 j. Fig. 7: cross-section of a thinner lamina, a ^. 

 Fig. 8: cross-section of a thicker lamina, -;[ Q . Fig. 9: cross-section of a 

 thicker midrib, \ s . Fig. 10: portion of fig. 9, (alcoholic), ''? Fig. 

 11 : portion of tangential section of intercostal membrane, showing cells 

 of the middle layer and rhizoids, 1 J -\-Fig. 12 : cystocarps, }. Fig. 13-14 : 

 young cystocarps, f. "/' res P-~Fig. 15: cystocarp formed on intercostal 

 portion, y. Fig. 16 : vertical section of a cystocarp, -^ . 



Delesseria' crassifolia Rupr. 



; U v b W W $. 



gg CLXVI1I |fs! Kit. 

 lit >* It .It y. % >*>* B * '& M ^ m ? & ? n if y, & fit > 



ft ft ^ A- b ^ - ^ It *R b B ^, M ? 40 cm. 5C - ^c #.h 



1 DeleBseria 7ttK^^- US ^ - 7 V 



