22 



CARL SKOTTSBERG, MARINE ALGM 2. RHODOPHYCEJE. 



Belongs to Delesseria, with sanguinea as type, and is near this; see figures of apex 

 and costa. 



Distribution: S. Georgia. 



D. fuegiensis nov. spec. — Fig. 5, 6 a — c. 



Callus radicalis crassus hemisphaericus. Lamina primaria breviter stipitata, sim- 

 plex, saltem ad 30 cm longa et 3 cm lata, valide costata et opposite nervösa, costa sal- 

 tem ad 4 mm lata et 1,75 mm crassa, in fronde adulta ± denudata et e margine distiche 



■"?oÖ> 



00°Po\ 



b 



'OptPeP. 





0OoV°o*j- 



o: 



Fig. 4. Delesseria salicifolia: a apex, x 400; b cross section of costa, X 70. Cortex cells dotted. 



pinnatim ramosa. Pinnae laminae simillimae, lineari-lanceolatae, dense opposite ner- 

 vosae, saltem ad 12,5 cm longae, maximae jam denudatae et e costa prolificantes, ceterae 

 minores, ad 1 cm latae, foliis fertilibns e costa pullulantibus. Cystocarpophylla ovato- 

 lanceolata, 2 — 10 mm longa, obtusiuscula, interdum e stipite brevi crassoque ramosa 

 sicut caespitosa, crasse costata, latere uno cystocarpinm singulum costale circ. 1 mm diam. 

 gerentia. Tetrasporophylla eodem modo in plantis tetrasporiferis evoluta, 2 — 12 mm 

 longa, utrinque secus costam sorifera, sed sporangia etiam in pinnis majoribus versus 

 apicem secus costam orta, tunc sporopliylla in hac specie liaud semper a pinnis sterili- 

 bus certe distinguenda. Planta mascula ignota. Crescentia apicis nec non structura 

 anatomica ut in D. sa?iguinea. 



F u e g i a : Slogget Bay, washed ashore (St. 47 b, 16. 3. 09, $, ©). 



A large and striking species of the »crassinervia-type ». It seems distinct from 

 D. crassinervia Mont., Laing (Auckland Islands); this is narrower, the leaflets are more 



