The Lycodinse of North Europe and Greenland. 



By 



Adolf Severin Jensen. 



T T fliilst engaged in working at the section ^ Ptsces for the c Conspectus Faitna: GroenlandtccB>, 

 V V the present anthor undertook a more extended research into the Greenland species of Lycodince. 

 This led quite natnrall>- to a revision of the remaining Lycodes-material in the Zoological Musetim, so 

 that the work gradually developed into a systematic working out of all the species of North Europe 

 and Greenland. From lack of material I was unfortunately obliged to omit the North American 

 forms almost entireh'. 



It is right and fitting that the work in its entiret)-, as it now appears, should be published in 

 the reports of The Danish Ingolf-Expedition» as a supplement to The Ichthyological Results , 

 seeing that this Expedition has provided the greater proportion of the material for the research. It 

 seems to me also that it would be an injustice to the Expedition, if its rich and valuable collection 

 of fishes were not utilised scientifically in a greater degree than has hitherto been done, the late 

 Prof. C. F. Liitken having been prevented by ill health from going deeper into the work. 



Several zoologists in foreign countries have afforded very great assistance during the course 

 of the work, by lending me specimens which it was of special interest to study anew; without this 

 assistance various important questions would have remained unsolved, and I take this opportimity 

 to express m}- warmest thanks to the following scientists: Conservator J. Grieg (Bergen), Prof. N. 

 Knipowitsch (St. Petersburg), Dr. E. Lonnberg (Upsala), Geh. Regier.-Rat, Prof. K. 1\I 6 b i u s (Berlin), 

 Hofrat, Dr. F. Stein dachner (Vienna) and Prof. T. Tullberg (Upsala). 



I owe especial thanks to Prof. F. A. Smitt (Stockholm) and to Prof. R. Collet t (Christiania). 



Prof. Smitt with the utmost willingness, gave me the greatest possible freedom to study the 

 rich collection of L>codes in the Riks-Museum. This collection was of great value as it supple- 

 mented that of the Museum here in many ways. 



Prof. Collet t with rare generosity has sent me several of his type-specimens for examination, 

 so that ni}- determinations have attained a sirrety which otherwise would not have been reached. I 

 have been permitted also, to study a large portion of the valuable Lycodes-material which has been 

 received at the Christiania Museum within recent years. To Prof. Collett, who has laboured inde- 

 fatigably throughout a long period of years, to increase our knowledge of the Lycodes-group and has 

 enriched the literature with a series of fundamental papers on the subject, I feel myself in addition in 

 a debt of a more ^Jersonal character for the interest with which he has followed the progress of 

 my work. 



The Ingolf-Kxpedition. If. 4 I 



