34 CARL SKOTTSBERG, MARINE ALG.3E 1. PHiEOPHYCEiE 



since 1906, so I am not absolutely sure of the identity; still my plants agree very 

 vvell with the original description and also with the figure in Kutzing, Tab. phyc. 

 VIII, tab. 12. 



Distribution: N. Zeal., Chatham Isl., S. Chile (for records from the far south 

 see under S. fasciculatus), Juan Fernandez. 1 



S. fasciculatus (Hook. fil. et Harv.) Cotton. — Fig. 14 a — b. 



Not uncommon in the lower litoral or upper sublitoral regions. Is la Huafo, 

 S. of Chiloé, Samuel Cove, in tide-pools (St. 31, 25. 7. 08, sp.). Fuegia: Puerto 

 Barrow (St. 42, 4. 3. 09, sp.); Slogget Bay, not rare on Mytilus in tide-pools (St. 

 47, 16. 3. 09, sp.); Orange Bay, in tide-pools (St. 45, 11. 3. 09, sp.). Falkland 

 Islands: West Falkl., Halfway Cove (St. 5, 25. 11. 07, sp.); Westpoint Island, 

 common in pools (St. 8, 6. 12. 07, sp.); Port Louis (St. 11, 7. 2. 08, sp.). 



My records of 8. australis in Ant. Meeresalg. I, p. 48 refer to S. fasciculatus. 

 With my new material at hand I can only confirm Cotton's view that they are two 

 quite different species. It is perhaps not right to bring them to the same genus. 

 The type of Scytothamnus is 8. australis, which has a cortex of conspicuous radial 

 cells and a finner medulla. The cortical cells of S. fasciculatus are not so regularly 

 arranged, the medulla is loose and composed of fewer longitudinal filaments and 

 laxly intervvoven hyphse. Of the remaining genera, Dictyosiphon has a »parenchym- 

 atic» cortex and Gobia short, almost free cortical cell-rows. There may be some 

 reasons for leaving 8. fasciculatus under Dictyosiphon, and also for bringing the new 

 species described below to that genus. 



In several instances hairs were observed in the present species, I believe for 

 the first time. They occur in groups, becoming more or less sunk below the surface 

 with the growth of the surrounding cortex, finally resembling true »cryptostomata», 

 but without having any relation to the formation of sporangia. Compare note on 

 S. australis. All the apices in my specimens are rather old, but in one or two cases 

 an apical cell, apparently inactive, was traced. 



Distribution: S. Chile to Fuegia, Falkl., S. Georgia, Kerg., N. Zeal., Auckl. Isl. 



S. hirsutus ngv. spec. — Fig. 14 c — g. 



Fröns epiphytica, sat pusilla, ad 5 cm älta axe primario 1 mm vel rarius ultra 

 crasso, basi disco minuto affixa, flaccida, olivaceo-fusca, pilosa, intus cava, ramosa; 

 rami interdum fasciculati; longiusculi vel brevissimi, basi et apice distincte attenuati, 

 pilis longissimis 10 — 12 jj. diam. vestiti. Structura anatomica fere ut in S. fasciculato, 

 sed tenuior, stratis cellularum perpaucis. Sporangia in speciminibus nostris sat raro 

 obvenientia, cortice immersa, 35— 45 1* diam. 



Falkland Islands: West Falkl., near Halfway Cove on Adenocystis and 

 Cladochroa (St. 4, 21. 11. 07, sp.); East Falkl., Port Darwin, on Adenocystis (St. 10, 

 16. 1. 08, sp.). 



1 WJiile no hairs were kuown to occur iu tliis plant nor were observed in my specimens from Chiloé, 

 all the plants from Juan Fernandez collected by the writer have typical cryptostomata. This is remarkahle, as 

 no other difference was found. 





