126 M. FOSLIE. [1905 



The species appears both in the lowest part of the litoral and 

 in the upper part of the sublitoral region, f. Laminarice, however, 

 only in the latter region. It seems to be best developed in lather 

 exposed localities, but it also occurs in sheltered ones. The alga 

 is furnished with reproductive organs nearly all the year. 



Area: Norway : Syltefjord in the East-Finmark, and the North 

 Cape, f. Laminar ice (!) Nordland — southward, f. Laminarice 

 (Kleen, Wittrock!,!); south-west and south coast, all the forms 

 except f. australis Q) 1 ); west coast of Sweden, f. intermedia, f. 

 corallinoe, f . macrocarpa (A r e s c h o u g, Wittrock, S tr 6 m f e 1 1 !) ; 

 Denmark, f. intermedia, f. macrocarpa (Rosenvinge!) 2 ); we- 

 stern Baltic, f. Corallince, f. Laminarim (Reinke); S. and S. 

 W. Iceland, f. macrocarpa, f. Laminarice (Strom felt, Jons- 

 son!), the Faeroes, f. macrocarpa (Simmons, Jonsson, Borge- 

 sen!), f. Corallince, f. Laminarice (Borgesen!); Shetland, f. 

 Laminariw (Borgesen); the Orkneys, f. Laminarice (Traill); 

 the British Isles, all the forms? (Harvey, Batters,!); Atlantic 

 coast of France, all the forms (Thuret, Le Jo lis, Crouan, 

 Rosanoff, Bo met!); the Mediterranean, all the forms except f. 

 Laminarice (Solms Laubach, Ardissone, Deb ray!); the 

 Adriatic, all the forms except f. Laminarice (Hauck, Wille!); 

 Morocco, f. australis (Kuckuck!); Canary Islands, f. australis- 

 (Houegger!); Natal (Isipingo), f. australis (A. Weber — van 

 Bosse!); Atlantic coast of America: From the West Indies, Flo- 

 rida and the Bermudas (Howe!) as far as Cottage City, Mass., 

 f. australis (Collins!), Nahant, Mass. , f. Laminarim (Collins!;, 

 Newport, R. I. to Yarmouth, N. S., f. macrocarpa (Far low, Col- 



!) On the South-west coast of Norway has been found a delicate form of this 

 species with small conceptacles on Zostera, but the sporangia are unknown. 

 It approaches in habit f. australis, but is likely to belong to f. intermedia 

 with bisporic sporangia. 



2 ) Among a collection of calcareous algae from Denmark, collected by Dr. 

 Kolderup Rosenvinge and kindly sent to me for examination, are 

 found some quite young, sterile and uncertain specimens partly associated 

 with Melobesia Lejolisii on Zostera, probably belonging to the same form 

 as that which occurs on Zostera at the South-west coast of Norway. — 

 Sterile and stunted crusts of the species in question also occurred on 

 Chorda fihim. 



