KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 61. N:0 II. 27 



determination of Cotton as to the specimens seen by him, but my material from 

 Patagonia proves that Ch. capensis is not the only species in the Magellan waters, 

 but that there is another, identical with or very near Ch. flagelliformis. 



Distribution: N. Atl. Ocean, Pacif. coast of A mer., Subantarct. A mer., Falkl., 

 ? Campbell Isl. 



Ch. linearis (HoOK. FIL. et Harv.) Cotton. — Fig. 13 b. 



Falkland Islands: Cape Pembroke, in tide-pools (St. 3, 7. 1. 08, sp.); 

 Westpoint Island, uppermost sublitoral, fine plants growing on calcareous algse (St. 

 8, 5 — 6. 12. 07, sp.). — This is certainly the Ch. linearis of Cotton: externally it 

 is very like the »Chordaria »-shoots of Ccepidium, but a horizontal thallus is entirely 

 missing and there is a small conical holdfast. The anatomical structure is different: 

 comp. fig. 13 b and 12 b, and note the shape of the endcells of the assimilators. 

 Cotton questions the occurrence of hairs; they are numerous on my material, very 

 slender and only about o \i thick. 



Distribution: Fuegia, Falkl. 



Csepidium J. Ag. 



C. antarcticum J. Ag. — Fig. 12. 



Widely spread in the lower litoral zone, sometimes abundant. Fuegia: Orange 

 Bay, only sterile coralloid thalli seen (St. 45, 11. 3. 09); Slogget Bay: crusts with 

 fertile vesicles (St. 47, 16. 3. 09, gt.). Falkland Islands: Port Louis, with 

 old decaying »Chordaria »-shoots and vesicles in all stages (St. 11, 7. 2. 08, sp., gt.); 

 Cape Pembroke, with numerous young erect shoots or with bladders of various shapes 

 and sizes (St. 3, 7. 11. 07, sp., gt.) and with well developed erect »Chordaria »-shoots 

 and also with bladders (St 3, 7. 1. 08, sp., gt.); West Falkl., near Halfway Cove, 

 crusts with young bladders (St. 4, 21. 11. 07, gt.); Westpoint Isl., as in St. 3 in 

 Nov. (St. 8, 5. 12. 07, gt., no ripe sp.). South Georgia: Stromnses Bay, in 

 tide-pools, coralloid crusts without ripe gametangia (St. 51 b, 24. 4. 09). 



Notwithstanding my detailed description in Ant. Meeresalg. I p. 40 etc. several 

 questions concerning Cazpidium remain to be answered. Agardh brought the plant 

 to the Chordariacese on account of the structure of the upright shoots, vvhich were 

 clothed with assimilators of the well-known type. My material, very large and from 

 many places, showed just the same thing. Neither of us could find any trace of 

 sporangia. I came to the conclusion that sporangia were not formed, but in this 

 I was entirely wrong. A marked periodicity in the subantarctic seaweeds seems to 

 be a rather uncommon feature, but from this rule Ccepidium makes an exception. 

 During the winter we find horizontal thalli, sometimes with small cups, from which 

 very short, simple upright shoots arise. Bladders of all sizes are also found. But 

 låter these upright shoots develop into large branched fronds like a typical Chordaria 

 and with typical sporangia. There is no doubt that Ccepidium belongs to the Chor- 



