Rhodophyceae. 



B a n g i a c e a e. 



Porphyra Ag. 



P. umbilicalis (L.) Kutz. — Kylin & Skottsb. p. 3. 



C h i 1 o é: Quemchi, in the litoral region, on dead branches of overhanging trees, 

 abundant (St. 30 c, 19.7.08, ?). Falkland I s 1 a n d s : Westpoint Island, in 

 the litoral region, common (St. 8 a, b, 5. 12. 07, $); Cape Pembroke, on uncovered rocks 

 and in tide-pools (f. laciniata, 7. 11. 07, ?). 



Distribution: Colder seas in both hemispheres. 



P. Woolhousiae Harv. Phycol. Austral. tab. 265. 



Falkland Islands: Westpoint Island, on Macrocystis pyrifera in beach 

 drift (5. 12.07, rf, $). 



The numerous specimens of this extremely delicate plant were quite intact and 

 had not travelled very far, and the Macrocystis belongs to the peculiar form growing 

 in the Westpoint Passage (see author's paper, Bot. Ergebn. VIII p. 49). This Porphyra 

 is known before from Tasmania and is well figured by Harvey 1. c. The Falkland speci- 

 mens agree perfectly well with description and figures. In both places it grows ex- 

 clusively on the marginal teeth of the kelp leaves, not on the margin between 

 the teeth or on the surface of the leaf. The base of my plants is slightly ponch-shaped 

 (as in many other species); this is not shown by Harvey 's figures, which were prepared 

 from dried material. The serial arrangement of the cell groups is more regular than 

 in most other species and is well exhibited by Harvey' s figures 3 and 4. It is, how- 

 ever, not equally conspicuous in all parts of the frond. My specimens are monoecious 

 with submarginal sori of rf of irregular elongated shape, sometimes interspersed by 

 small patches of $, the latter otherwise forming large, pure sori. Thickness of sterile 

 frond 21—24 [x, of sori 29—30 ft. 



Distribution: Tasmania, Falkl. (first record). 



