KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 8- 



23 



acuminate, and no secondary nerves are visible (Laing in Subant. Isl. p. 521, pl. 21). 

 Specimens of D. crassinervia from Auckland Isl., collected by Hooker (Brit. Mus.), 

 are very like fuegiensis in habit, but Cotton, who has examined them, has written on the 

 sheet: »transverse veins microscopic, anastomosing, inconspicuous, visible only on 

 main wings». I cannot tell if Kutzing's crassinervia from Kerguelen (Tab. phyc. 

 XVI, t. 12) is the same as Montagne's, but it is not D. fuegiensis. 



I found five specimens of D. fuegiensis, three with tetraspores (fig. 5 a) and two 



Qm 



: °öo 



c^ 



tSEpSQh 



Fig. 5. Delesseria fuegiensis: ä lower part of a tetrasporic specimen, nat. size; b apex of a tetrasporophyll, x 360; C part 



of eross seetion throtigh old costa, X 180. Cortex cells dotted. 



with cystocarps. As a rule, the sporophylls are borne by lateral pinnae of the first order. 

 They vary considerably in size and shape (fig. 6 a, b). A large sporophyll may carry 

 minute sporophylls along the midrib, and, on the other hand, larger pinnae sometimes 

 produce sori. The female leaflets (fig. 6 c) are of a more uniform size than the tetra- 

 sporophylls. They are simple or carry new cystocarpophylls on the base of the midrib. 

 It also happens that larger pinnae of first order bear a cystocarp, so that the variation 

 found in the position of the sori is repeated. Fig. 5 b shows that the apical growth takes 

 place as in D. sanguinea, and fig. 5 c that numerous hyphae develop in the costa. D. 

 fuegiensis is, to judge from the habit, an annual species. 

 Distribution : Fuegia. 



