KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63- NIO 8. 45 



Nitophyllum Grev. 



N. Crozieri Hook. Fil. et Harv. — Kylin & Skottsb. p. 31. 



F u e g i a : Slogget Bay, drifted (St. 47 b, 16. 3. 09, ?, © ). Falkland Is- 

 lands: Port William, on Macrocystis (St. 2, 7. 11. 07, <?); Cape Pembroke, in tide- 

 pools, small, perhaps doubtful specimens (St. 3 b, 7. 11. 07, S, ©); Halfway Cove, sublit. 

 8 m (St. 5, 25. 11.07, $). 



Distribution: Fuegia, Falkl. 



N. lividum Hook. Fil. et Harv. — Kylin & Skottsb. p. 32. 



C h i 1 o é : San Pedro Island, 10 m, sand and gravel (St. 32, 28. 7. 08, $, © ). 

 South Pa tagonia: Fitzroy Channel, 13 — 14 m, gravel (St. 17, 18.4.08, ©). 

 Falkland Islands: Westpoint Island, in tide-pools (St. 8a, 5.12.07); Cape 

 Pembroke, in tide-pools (St. 3 b, 7. 11.07, <J, $). 



Distribution: S. Chile to Fuegia, Falkl. 



N. sm i ih i i Hook. Fil. et Harv.; Cotton, Crypt. Falkl. p. 182. - - Kylin & Skottsb. 

 p. 33. 



Af ter an examination of Hooker's type material I bring the following specimens, 

 left unnamed in the collection of 1902, to N. Smithii: Falkland Islands: Stanley 

 Harbour, drifted (St. 47 b, 18. 8. 02, $), a good specimen growing on Codium mucro- 

 natum, with a branched stipe and cuneate-flabellate segments, veined in their lower 

 portions; Hooker's Point, in tide-pools on sponges (St. 48, 18. 8. 02, o ), one small but 

 complete specimen, strongly ribbed. 



KtJTZiNG and Agardh refer N. Smithii to Cryptopleura, where the frond has a 

 network of microscopic veins, but these are missing in the type of Hooker, as defined 

 by Cotton. Of the specimens from Graham Land, St. 95, named Smithii, one agrees 

 very well with the type; in the other, the corticated nerves are continued by mono- 

 stromatic veins, 2 or 3 cells wide. 



I shall add a remark on the plant I callecl N. fuscorubrum in 1919, collected by 

 me in South Georgia. It bears a strong externa! resemblance to this species, but a com- 

 parison with the type of Hooker (Kerguelen) shows a notable difference, for in N. 

 fuscorubrum the superficial cells measure 25 — 35 ji against 45 to 80 y. in my plant. The 

 former is thicker in section, and of a deeper almost brownish red colour, as the name 

 indicates. A comparison with the type of N. Smithii shows that the South Georgian spe- 

 cimens approach this species more than any other. I have some pieces in alcohol, 

 with coarse, distinct ribs, while the two dried specimens, each with an old branched 

 stipe and numerous cuneate-oblong fronds, have no nerves at all. In the type specimen 

 of Smithii there are several fronds from a common substratum, that hides the lower 

 part of the stipes and cannot be removed without damage, and one of these fronds, 

 about 6 cm long, is veinless. N. fuscorubrum from West Patagonia (De Toni and Forti 



