298 



F. BORGESEN 



of Collins and Hervey. As the specimens from Easter Island (Fig. 37 b) 

 regarding the shape of the cortical cells agree with the statement of Mine. 

 WEBER I think T need not lay stress upon the remarks of COLLINS and Hervey 

 as to his point. 



Specimens with cystocarps and tetraspores (Fig. ^y c) were present. In 

 the tetrasporic specimens the tips of the filaments were flattened in a peculiar 

 way (Fig. 37 a). 



Area of distribution: Bermuda, Celebes, Easter Island. 



C. Skottsbergii H. E. Petersen, nov. spec. — Fig. 38. 



In the material a small Ceramium is found characterized b}' very narrow 

 cortical belts in which several pericellular spinelike hairs are present. I consider 

 this plant to be a new species. Here the diagnosis: 



Fig. 38. Ceramhun Skottsbergii nov. spec. 

 Part of filament, showing spinose cortical belts, c. 180 /i. 



Fronde repente, irregulariter ramosa; zonis semper discretis, paucis cellulis 

 constantibus, altitudine zonarum 15 — 25 ji, saepe duobus cellulis formata. Cellulis 

 axialibus usque ad 80 \l altis; 70—75 {i latis. Pilis verticillatis e cellulis zonarum 

 formatis, articulatis, ex 3 cellulis compositis, c. 30—35 ;j. longis, c. 8 [x latis, obtusis. 



Organa fructificationis non visa. 



Area of distribution: Endemic. 



Earn. Rhodomelaceae. 

 Laurencia Lamour. 



L. claviformis nov. spec. — Fig. 39. 



Planta caespitosa, ca. I V2 —2 cm alta, e ramis basalibus repentibus et 

 ramis erectis composita. Rami basales rhizoideis robustis saxo adfixi. Rami 



