28 



CARL SKOTTSBERG, MARINE ALG.E 2. RHODOPHYOE./E. 



above all, very irregular, see fig. 9 b. And in the stipe I do not find the marked diffe- 

 rence between medulla and cortex, while some hyphae seem to ooeur (fig. 9 c). One 

 of Agardh's Apoglossa, A. decipiens, possesses the regular veins of A. ruscifolium, but 

 has the costa built exactly as in D. sanguinea and cystocarps and sori on smaller 

 leaflets as in D. fuegiensis. As long as we do not know what we have to under- 

 stand with a true Apoglossum (I doubt that the microscopic veins are a character 

 of generic value), it seems better to list D. macloviana under Delesseria. The few speci- 

 mens collected by the writer are small and very narrow. D. crassinervia (3 costa angustiore 

 of Hooker and Harvey is better developed. There is one specimen in Brit Mus., Falkl., 

 Berkeley Sound, leg. Lyall, and Cotton has written on the sheet: »träns verse veins 



Fig. 9. Delesseria macloviana: & apex, x 360; b part of wing from surface, showing microscopic veins; the dotted line 

 indicates edge of corticated midrib, X 180; C part of cross sectiou through stipe, X 1 SO. 



microscopic, opposite, branched, anastomosing »; another sample of this plant is atKew; 

 see below under Pseudophycodrys phyllophora. 

 Distribution: Fuegia (first record), Falkl. 



Microrhinus no v. gen. 



Fröns callo radicali affixa, inferne caulescens, superne foliacea, late costata, ubique 

 (apicibus crescentibus exceptis) polystromatica, carnosa, e stipite nec non c margine la- 

 minae sat irregulariter pinnata. Crescentia apicalis ut in Delesseria. Lamina strato 

 centrali c cellulis majoribus, cortice pleiostromatico parvicellulari; costa hyphas nume- 

 rosissimas ])raebens. Organa fructificationis in foliolis marginalibus vel submarginali- 

 bus caespitosis evoluta. Cystocarpia in foliolis lateralia et solitaria, costam insidentia, 

 structura Delesseriae, sed orificio tubuliformi protracto sursum curvato instrncta. 

 Tetrasporangia utroque latere evoluta, foliola minora omnino, majorum apicem sohim 



