KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. NIO 8- 11 



Miss. sci. V p. 71, identifies no. 550 with A. concinna J. Ag.; this is wrong as also his state- 

 ment that no. 181 (G. implicatus) is the same, for no. 181 is Gracilaria aggregata (q. v.), 

 a species incorrectly referred to A. plicata by Hariot. 



South Patagonia: Fitzroy Channel, sublit. 13 — 14 m, gravel, rather 

 typical plicata and large specimens of setacea (St. 17, 18. 4. 08); Otway Water, Puerto 

 Pomar, rather typical (St. 15, 14. 4. 08). F u e g i a : Admiralty Inlet, a coarse plicata 

 (St. 13, 25. 3. 08); Slogget Bay, in tide-pools, a very proliferous plicata (St. 47, 16. 3. 09), 

 and drifted (St. 47 b), attached to a stone and quite like elongata. 



Distribution: Northern, Aret. and Temp. seas; Chile to Fuegia, Falkl., Kerg., Gra- 

 ham Land. 



Sterrocolax Schmitz. 



S. decipiens Schmitz, Actinococcus p. 394. 



South Patagonia: Fitzroy Channel, on Ahnfeltia setacea (St. 17, 18. 4. 08). 

 Fuegia: Admiralty Inlet, on A. plicata (St. 13, 25.3.08). 



The type came from Chile (Chiloé), growing on A. setacea, but Schmitz reports 

 the same on European plicata. 



Distribution: Probably the same as of the höst; Cotton, Crypt. Falkl. p. 178 re- 

 cords the parasite from Falkland as proved by Hohenacker's A. plicata (no. 555). I 

 ha ve also found it on no. 180 (good A. setacea from Corral), with »monosporangia » as 

 described by Schmitz; the lätt er specimens are more spherical and the attached area 

 smaller, suggesting S. crassior Schmitz. 



Gymnogongrus Mart. 



G. disciplinalis (Bory) J. Ag. Sp. Alg. II p. 319. 



Fuegia: Slogget Bay, in tide-pools on rocks and stones, a luxuriant form with 

 broad segments (St. 47, 16. 3. 09). Falkland Islands: Cape Pembroke, large 

 tufts in shallow pools (St. 3 b, 7. 11. 07, $). 



My specimens are identical with others from Cape Horn, comm. by Lenormand 

 (Herb. Upsala). Howe, Mar. Alg. of Peru p. 107 finds it difficult to distinguish this 

 from G. furcellatus; I have observed some slight differences in the anatomical strueture: 

 G. furcellatus has a more compact medulla of smaller cells and a thicker, less sharply 

 defined cortex, but such differences are probably of little real value. 



Distribution: Peru, Chile to Fuegia, Falkl. (first record). 



ii. furcellatus (Ag.) J. Ag. 1. c. 218. 



Syn. Gigartina ancistroclada »Mont. » in Hohenacker, no. 381 (Chiloé; the true 

 species came from Akaroa, leg. D' Ur ville); G. filiformis KtiTZ., Hohen. No. 565 

 (Chiloé); Chondrus violaceus Sond., Hohen. no. 549 (Chiloé). 



