No. 3] REMARKS ON NORTHERN LITHOTHAMNIA. 33 



Jonsson!); The Faroes (Borgesen I) 1 ) ; Scotland: Bute at Port 

 Bannatyne (Holmes, Robertson!) 2 ); (Bermuda, leg. J. C. Hill?) 3 ); 

 Atlantic coast of North America : Massachusetts — Maine (Collins, 

 Farlow!); Nova Scotia (Ruggles, Mack ay, Howe!), New- 

 foundland (Waghorne, Hoi den, Howe!), Labrador (Carpen- 

 ter!); Ellesmereland, southern coast: Havnefjord, Exkrementbugten, 

 Jammerbugten (Baumann, Bay, Simmons!); West-Greenland 

 (Rosenvinge!); East-Greenland: Heklahavn (Rosenvinge!); 

 Jan Mayen (Jonsson!), Spitzbergen (Kj ell man!); the Murman 

 coast and the White Sea (Gobi!); Nova Zembla, west coast 

 (Kj ell man); the North west coast of America (Saunders, 

 Set c he 11 and Gardner!)? 3 ) 



Sub fossil: LithotJi. glaciate has also been found subfossil 

 in several places. Thus at Tamso in Finmark I have taken it 

 under the green turf a few meter above the level of the sea, at 

 Korsnes in the Altenfjord too. Besides, it is probably in part this 

 species which has been met with ■ in several other places, from 

 Vadso in East-Finmark and southward as far as the mouth of the 

 Trondhjemfjord, sometimes even up to 50 meter above the level 

 of the sea. The subfossil specimens pictured in Norw. Lithoth. 

 pi. 23 perhaps also in part belong to this species. The main part 

 of the material of subfossil Norwegian Lithothamnia, a number of 

 which also are kept at the Geological Institution at Christiania, has 

 not yet been closely examined. 



Interesting subfossil finds of the species in question have also 



x ) The specimens seen from that place are young and, therefore, the deter- 

 mination may admit of doubt. One of them approaches young L. colli - 

 culosum in habit. 



Cp. C. W y v i 1 1 e Thomson. The Depths of the Sea. London 1874. 

 Pag. 60: „On the 15th and 16th (August) we dredged over the Faroe 

 Banks at a depth of from 200 to 50 fathoms, the bottom gravel and 

 nullipore, and the temperature from 8° to 10 C." It would be of great 

 interest, if it could be ascertained whether the said nullipores were actually 

 Lithothamnia, in that case not unlikely L. glaciale. 



2 ) I possess a few specimens with two-parted sporangia from that place, which 

 in my opinion must be referred to Lithoth. glaciale f. sub fastig lata. Cp. 

 below under L. tophiforme. 



3) Cp. above under remarks on the distribution of the species. 



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