KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 8. 53 



calary walls, thus suggesting the Delesseria-type, but in other cases I am less sure of 

 this. It cannot be denied that the female frond in Polycoryne bears a certain resem- 

 blance to the »pedicellate » cystocarp of Delesseria sanguinea, and the formation of 

 spermatanges does not speak against a possible affinity with Delesseria, rather than with 

 Xitophyllum. 



New microtome sections give a better idea of the parasitic habit of Polycoryne; 

 as the pore connections are quite distinct, it has been possible to trace the hypha-like 

 filaments that penetrate deep into the tissue of the höst, fig. 25 b — d, so as to leave little 

 doubt about the true parasitic character; but new and better preserved material is neces- 

 sary if we want to know the histological details. 



Bonnemaisoniaceae. 



Ptilonia J. Ag. 



P. magellanica (Mont.) J. Ag. — Kylin & Skottsb. p. 51. 



South Patagonia: Fitzroy Channel, 13 — 14 m, gravel (St. 17, 18. 4. 08, 

 $). F u e g i a : Slogget Bay, beach drift (St. 47 b, 16. 3. 09, ?); Magellan Strait, Susanna 

 Cove, 15—18 m. 



Distribution: S. Patag. (first record), Fuegia, Falkl., Kerg., Graham Land. 



Rhodomelaceae. 

 Chondria Ag. 



Ch. angustata (Hook. Fil. et Harv.) Kylin in K. & Skottsb. p. 52. 



Fuegia: Slogget Bay, on Ahnfeltia in beach drift (St. 47 b, 16. 3. 09); Tekeenika, 

 Allén Gardiner Bay, washed ashore (St. 47 B, 10. 3. 09). 

 Distribution: Fuegia, Falkl. 



Lophurella Schmitz 



L. Hookeriana (J. Ag. ) Falkenb. — Kylin & Skottsb. p. 53. — Fig. 26 a — b. 



South Patagonia: Fitzroy Channel, 13 — 14 m, gravel (St. 17, 18. 4. 08, 

 ?, ©). Fuegia: Slogget Bay in tide-pools on Mytilus (St. 47, 16. 3. 09) and washed 

 ashore (St. 47 b, e). Falkland Islands: Westpoint Island, common on cal- 

 careous algae in the litoral region (St. 8 b, 5. 12. 07); Cape Pembroke, in the same kind 

 of station (St, 3 b, 7.1.08, ©). 



The lateral branches originate as described by Falkenberg, Rhodomel. p. 159 

 for L. comosa. The segmentation is clearly visible in L. Hookeriana, less so in comosa 

 and rather indistinct in patula, see fig. 26; in comosa also the cortex shows the segmenta- 

 tion. 



Regarding the identity of Rhodomela Gaimardi Bory, I ha ve not been more success- 

 ful than earlier authors who have tried to solve this question. According to Bory and 



