KTJNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 8. 



27 



shown by my illustrations. It differs in the colour of the adult lamina, being dark 

 brownish red, in the thicker frond, much less adhering to the paper, and in the much 

 richer development of anastomosing tertiary nerves. The minute proliferations look 

 alike in both, but are sterile in the only large specimen found (figured 1. c. p. 42), while 

 the sori form lines along the nerves almost filling the space between them. According 

 to Agardh 1. c. p. 496 sori are found both on the lamina and in leaflets in D. lancifolia. 

 The cystocarps occupy the same site in both. 



D. macloviana Skottsb. in Kylin & Skottsb. p. 43 f. 21 b. — Fig. 9. 



Syn. D. crassinervia (3 costa angustiore, Hook. Fil. et Harv. Fl. Ant. II p. 471. 

 Additional locality: F u e g i a : Beagle Channel, sublit. 8 m, gravel and shell 

 fragments (St. 10 b, 15. 3. 1902). 



Fig. 8. Delesseria Larsenii, cross section of costa, x. 180. 



In the collection of 1907 — 09, this species is missing/but new observations were 

 made on the old material. The mode of growth (fig. 9 a) is the same as in D. sanguinea. 

 The species comes near D. epiglossum, differing in the long terete stipes of the prolife- 

 rations, which are, besides, much less numerous and not distichous, further in the nar- 

 rower leaves, in the microscopic venules, and in the scarce hyphae in the costa. L. c. 

 I brought it to Apoglossum of J. Agardh (Sp. Alg. III p. 491, III: 3 p. 190), described 

 as hav ing the ramification of Hypoglossum but differing in the presence of transverse 

 microscopic veins, formed by elongated cells of the secondary filaments, the interspace 

 being filled by the cells of the tertiary filaments, låter arranged in an apparently irregular 

 manner and contrasting with the regular veins. But the genus Apoglossum is not homo- 

 geneous. I cannot tell which of Agardh's species should be regarded as »type». In the 

 common European A. ruscifolium the old costa has a central medulla of larger cells 

 without any hyphae and a thick cortex of very small cells, resembling what we find in 

 Phycodrys and its allies, although the regular radial position of the cells is missing. 

 Agardh seems to have observed hyphae — »velut minus conspicuae» — also in this 

 species. A. Montagneanum J. Ag. (New Zealand, Berggren) agrees with ruscifolium 

 in most respects. In D. macloviana, the microscopic veins are much less conspicuous and, 



