Contributation. T, 



11 



1- 



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litary specimen of an alga, wliicli I suppose belongs to tbe 



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genus Lithophylhim ^ and not referrible to any known speci- 

 es of the genus. Althougb it is a rather doubtful one, and 

 the specimen is young and barren, I want to give it a na- 

 me. It grew fastened to Lithothamnion glaciale^ and it very 



much reminds of young specimens of LitJiopliyUum arcticum 

 K j e 1 1 m. Cp. Kariska Hafvets algv. p. 16, t. 1, fig, 1. But 

 accordingto Kjellma n, who hashad thekindness to exami- 

 ne it, it cannot be referred to that species. It difPers by 

 its thicker crustj being unbranched, and by wanting rid- 



ges. 



The plant forms incrustations on the host plant. The 

 crust is rather closely adherent to the substratum, 0.75 

 1.5 mm. thick, and the surface uneven. The uneveness 

 seems to be caused by the substratum, to which it elings, 

 though not always closely. The circumference is not every- 

 where free ; the free part is 0.5—1 mm. thick, and the 

 margin shallowly lobated and somewhat undulated, with 



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distinct subconcentric stripes or feeble ridges. 



The specimen was found in the harbour of Kjelmo in 

 Sydvaranger, on a depth of about 3—4 fathoms. 



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Gen. Helobesia (Lamour.) Rosan. 



Melob. p. 53; Lamour. Bull. soc. Phil 1812, sec. Rosan. 1. c. p. 60. " 



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Melob esia macrocarpa Rosan. . 



Melob. p. 74. 

 ^cscr. Melobesia macrocarpa Kosan 1. c. 

 Fig. „ „ ■ „ 1. c t. 4, fig. 2~8 et 11-20. 



In the upper part of the sublitoral zone at Kiberg in 

 "the neighbourhood of Vardo I found a couple of specimens 

 of a coarse Melohesia^ fastened to the stipe of Laminaria 

 ^ypcrborea, which resembles this species. However, they we- 



?e ^.terile ^^d, th^i^eforcj the determination is not quite siir^, 



