COPEPODA 



by the material gathered by the investigation-Steamer »Thor«, the leader of which was Dr. J. 

 Schmidt, in the year 1903 — 1905. The region investigated by the Thor is the eastern part of 

 Denmark Strait, the Atlantic South of Iceland, the Iceland-Faeroe Channel, a few Stations North- 

 east of Iceland and outside the Ingolf area, the Atlantic, South West of the Faeroes. The hauls of 

 the Thor were made with the young-fish trawl from the surface down to a depth of nearly a thousand 

 meters (length of the wire out about 1800 meters.) 



As the meshes of the young-fish trawl were rather wide, and as I have only examined few 

 of the surface samples, the Thor material gives a rather onesided picture of the fauna of pelagic 

 Copepods from these tracts. Several of the Copepods from the Thor were by Dr. Ove Paulsen sent 

 to Professor G. O. Sars for determination; to the former of these gentlemen I am indebted because he 

 kindly lent me these specimens, to the latter, one of the first anthourities on the Copepods, for 

 much useful information. 



The third Danish Expedition to East Greenland under the leadership of the captain in the 

 navy Amdrup and with the late mag. sc. Soren Jensen as zoologist in the year 1900 has gathered 

 numerous samples during the journey. Surface samples were gathered each hour, day and night, from 

 J 9/ 6 — 2 5/ 6 in the western part of the Norwegian Sea from 6o° L. N. 3 L. E. to near Jan Mayen; from 

 27 /6 — 10 / 7 during the Journey from Jan Mayen to near the East Coast of Greenland (at about 72 L. N. 

 2i° L. W.) in water, which often contained Scattered Ice. During the journey home from 3°/ 8 to 3°/ 9 

 samples were taken generally each second hour of the day in the ocean North-West of Iceland, in 

 Denmark Strait and in the Atlantic South of Iceland as far South and East as 59 L. N. 

 o. 52 L. W. 



These surface samples (marked A, B, C, but generally F) as a rule only contain comparatively 

 few specimens and species, but they give nevertheless a very good impression of the diurnal variations 

 in the occurrence of the most common species Cal. finmarchiciis at least at the surface. The 

 mentioned Expedition has at Jan Mayen as well as near the Coast of East-Greenland taken some 

 vertical hauls with the closing net at moderate depth. 



In addition to these I have examined a few samples from East Greenland collected by cand. 

 E. Bay and Dr. H. Deichmann. 



Our museum contains a good many samples containing Plancton-Copepods, from the west 

 Coast of Greenland, collected by Bergendal and W. Lund beck, as well as from the waters around 

 Iceland, brought home by mag. sc. R. Horring, A. Ditlevsen, W. Lundbeck and Lieutenant in 

 the navy E. Jensen. 



To discuss the number of species, which has been found in each of the explored regions by 

 the different Expeditions as well as other questions concerning the distribution of the species, will 

 more naturally fall within the next volume of this paper, which will deal with the Calanoida 

 heterarthrandria; in the next volume I hope to be able to publish a list, showing the number of 

 species and the proportionate number of the specimens of each successive stage occurring at 

 each Station. 



At present I am only going to say a few words about the number of species brought 

 home by each Expedition. I have altogether examined 79 species, which probably belong to the region; 



