256 CARL SKOTTSBERG 



Dcs»ianstia Harveyaiia (PL VII.) aiul aiicrps (PI. \'III.) are the most 

 inii^ortant species. y\t least the first seems to thrive everywhere. D. 

 Rossii has not been dredged by me, but has been observed at the 

 South Orkney Islands. Among the Phreophycea; we further mark an 

 Unnllwa (.'^), i — 2 m. long, which is ver\' common, especially on steep 

 walls in the upper sublittoral region and [perhaps consists a peculiar 

 formation, and Lcssoiiia sii)inlaiis, of which 1 found s])ecimens of 5,5 m. 

 length. ScytJiothalia J acqiiinotii probably belongs to the sublittoral re- 

 gion, though I only found it floating, not growing. One Sphacclana 

 and AdowcYstis Lcssonii also must be mentioned here; the latter is 

 more common in littoral pools. I am sorry that I must quite leave out 

 a couple of species, of which only the recollection remains and the 

 systematic position of which is very doubtful. They were as far as I 

 could judge new species of great interest. 



In the Dcsmarcstia-{oxv(\?i.\\ox\ grows a lot of Floridea?. This col- 

 lection is far from worked out, and I only give the following as a pre- 

 liminary list, which the future will certainly change and make more 

 complete: Aluifcltia sp., Callithanniion sp., Callopltyllis varicgata. Cc- 

 raiuhan sp., Delcsscria [Schizoneura] qucrcifolia. Deli sea pule lira. Graci- 

 laria {Leptosarea) simplex, Kallyme^iia (.•^) sp., Nitophylhuii sp., PJiyllo- 

 p/iora sp., PloeaDiiuiii Hookeri, Polysip/ioiiia sp., Piilota cfr. co)ifliiens, 

 Rhodyiiieiiia sp., &ca, and Corallinacece on shells. Generally the algtt 

 were very pure, only Tew parasites were seen. 



From Gei'Ps' and Holmes's lists on South Orkney alga^ may be 

 seen that a fine vegetation has been dredged in Scotia Bay at 9 — 10 

 fathoms: Aeaiithoeoeeus spiJiiilii^er, Ploeauiiiiui Hookeri, eoeeiiieimi and 

 seciindatum. Pteridiiini prolifcnim, ScytliotJiammis Jiigiilostis. Crypfoneinia 

 liixiirians, Petrocelis cruenta, LitlwtJiamnium inagellaniciiui. Lithopliylhoii 

 discoideum and decipiens. 



The el i tt oral region. 



As I have mentioned above I include the occasional tlisco\"eries of 

 algai, made at a greater depth than 40 — 50 m. under the elittoral flora, 

 just as KjElLMAN has done before. As I consider this question to be 

 of considerable interest and not fully worked out, 1 shall occup\- my- 

 self with it here a little. 



KjELLMAN ' writes: Those few specimens of alg?e which ha\'c 

 sometimes been brought up h\' the dredge from a greater depth than 



' Alg. .\rct. Sea, p. 10 — 11. 



