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the Limfjord by vessels coming through the Thyborøn channel. Several 

 vessels are yearly coming that way from the western countries. Accord- 

 ing to van Goor, C. tomentosum has immigrated to the coast of Hol- 

 land since 1900. A specimen in the herbarium of the Botanical Museum 

 of Copenhagen gathered at Helder by Mrs. Weber-van Bosse, however, 

 was found by the writer to be C. mucroratum. This species seems thus 

 to be extending its area on the coasts of Europe, and that strengthens 

 the supposition that is has, though long time ago, been introduced to 

 Europe from some exotic coast. 



