KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 61 . N:0 ||. 39 



almost lack hairs. It lies near at hand to suspect that the salinity stånds in some 

 relation to the formation of hairs in this special case, a theory to be confirmed or 

 rejected "on the basis of experiments. I have examined a number of small Cladothele 

 plants from St. 3 ; there were some with only sporangia, others with only gametangia, 

 and again some with both kinds of reproductive organs. But in no case the slightest 

 trace of a hair was found. Otherwise many of these small plants were quite like 

 var. striarioides, having a much smoother, less papillose surface than the larger ones. 

 To judge from the description, Rosenvinge^ Coelocladia (Grönl. Havalger, p. 

 866) is very like Cladothele, but it shows a much more pronounced difference in the 

 size of the central and peripheral cells and becomes hollow with age. The growth 

 is trichothallic. 



Adenocystis Hook. fil. et Harv. 



A. utricularis (Bory) Skottsb. — Fig. 16 a — f. 



Very common in the upper sublitoral and lower litoral region, especially 

 in tide-pools. West Patagonia: Puerto Bueno, on Mytilus, 1—3 m (St. 

 27, 3. 6. 08, sp.). S. Patagonia: Canal Gajardo, Puerto Témpanos (St. 21 b, 

 27. 4. 08, sp.); Otway Water, Puerto Pomar (St. 15, 14. 4. 08, sp.); Canal Jerönimo, 

 Cutter Cove (St. 14, 13. 4. 08, sp.); Arauz Bay (St. 23, 3. 5. 08, sp.); Susanna Cove 

 (leg. A. Pagels), 15—18 m. Fuegia: Ushuaia (St. 46, 14. 3. 09); Slogget Bay (St. 

 47, 16. 3. 09, sp.); Puerto Barrow (St. 42, 4. 3. 09); Admiralty Inlet, Hope Bay 

 (St. 13, 25. 3. 08). Falkland Islands: Port Louis (St. 11, 7. 2. 08, sp.); Cape 

 Pembroke (St. 3, 7. 11. 07, sp.); Stanley Harbour (St. 1, 1. 11. 07, sp.); Darwin 

 Harbour (St. 10, 16. 1. 08, sp.); Low Bay (St. 10 b, 18. 1. 08); Port North (St. 7, 

 2. 12. 07); Westpoint Isl. (St. 8, 5. 12. 07, sp.). South Georgia: Boiler Har- 

 bour (St, 48, 20. 4. 09, sp.); Stromnses Bay (St. 51, 24. 4. 09). 



f. longissima nov. form. An =Chorda rimosa Mont.? 



A typo differt frondibus linearibus longissimis, ad 20 cm longis et 5 — 10 mm 

 solum latis, plus minusve tortuosis et irregulariter subconstrictis. 



S. Patagonia: Otway Water, Puerto Pomar, with the ordinary form (St. 

 15, 14. 4. 08, sp.). Fuegia: Slogget Bay, with the ordinary form (St. 47, 16. 3. 

 09, sp.); Tekeenika, drifted (10. 3. 09, sp.). Falkland Islands: Port Louis, 

 with the ordinär}' form (St. 11, 7. 2. 08, sp.); Cape Pembroke, with the ordinary 

 form (St. 3, 7. 1. 08, sp.); West Falkl., near Halfway Cove, uppermost sublitoral 

 (St. 4, 21. 11. 07, sp.). — This curious form is rather puzzling: externally it agrees 

 with Scytosijrfwn lomenlaria, but the structure is entirely that of Adenocystis. It gener- 

 ally grew together with typical plants, sometimes even springing from the same 

 basal disc, which may, however, be the result of a fusion between holdfasts of several 

 specimens. I have not seen any real transitional forms. In cross section it is quite 

 like ordinary Adenocystis, while the longitudinal section, as could be expected, exhibits 

 more elongated subcortical cells. It is not impossible that Chorda rimosa Mont. from 

 the Auckland Islands (see Kutz. Tab. phyc. VIII p. 7 tab. 15) is the same. Accord- 



