PART I 



FREE-SWIMMING, LITTORAL AND SEMI-PARASITIC 



COPEPODA. 



INTRODUCTORY. 



The present report deals with the Free-Swimming, Littoral and Semi-Parasitic Copepoda 

 obtained principally from the plankton collected by the various tow-nets employed during the 

 investigations. Three bottles containing washings from dredged invertebrata were also sent to me 

 for examination. These washings contained a number of interesting species of Harpacti coida, 

 Lichomolgidae and Asterocheridae which would probably never have been secured by 

 the ordinary method of tow-netting. 



The total number of collections sent for examination was 86, and represents the following 

 methods employed on board H. M. S. 'Siboga'. 



Day Surface Collections 50 



Night Surface Collections 13 



Hensen Vertical Net, Night Collections from 10 metres with Electric Hght in Net. . 4 



Hensen Vertical Net, Collections between 100 and 2000 metres to surface ... 11 



Horizontal Cylinder Collections 4 



Fowler Closing Net Collections 1 



Washings from Dredged Invertebrata 3 



Total 86 



Only selected samples of the Copepoda were at first submitted for investigation. Every 

 Copepod in each of these samples was identified and separated out. This furnished some 

 indication of the value and richness of the material. Finally the whole of the crustacea plankton 

 was sent for examination at the end of 1902. Owing to the contents of the cases being 

 incompletely declared, and a portion being preserved in dutiable spirits, very great difficulty 

 was experienced in getting the collection released by the British Customs Authorities at the 

 Port of Entry into the Kingdom. After considerable correspondence and representation of the 

 scientific value of the material, the cases were set free on payment of the duty charge on one 



1 



SIROGA-EXPEDITIK XXIX il. I 



