np^HR present paper on the Zoantliaria (Zoanthidae) has been drawn np according to the same plan 

 -^ as ni}' report on the Ceriantharia of the Ingolf-Expedition. Tims, it comprises not only the 

 Zoantharia collected dnring the Ingolf-Expedition bnt also all the other northern and arctic forms of 

 this gronp of animals which have been sent to me for examination, especially from the Riksmuseinn 

 in Stockholm bnt also from the mnsenms in Copenhagen, Upsala, Bergen, Trondhjem and Tromso. 

 Besides, I have had the opportnnity of examining some forms from the nuisenms in Vienna and 

 Berlin. To the chiefs of the Invertebrate departments or the custodians of the Coelenterata at these 

 musenms I would offer ni)- best thanks for having lent me the material required. I am also greatly 

 indebted to my colleague Docent Nils Holmgren in Stockholm for helping me to photograph the 

 originals for the figures reproduced on PL 2. 

 The paper is divided into three parts: 



1. Literature and summary of the northern and arctic Zoantharia. 



2. Contribution to the systematic classification of Zoantharia (Zoanthidae). 



3. Description of the species. 



