MEDDELELSER FRA DET ZOOLOGISKE MUSEUM, KRISTIANIA 



Nr. 4. 



Parasitic Copepods in the Collection of the 

 Zoological Museum, Kristiania. 



By 

 Charles Branch Wilson, Ph. D. 



Westfield, Massachusetts, U. S. A. 



VV hile the following list of specimens does not include 

 any that are new to science, the localities from which they were 

 obtained and the hosts are in most instances different from those 

 previously reported. Several of the records, also, serve to verify 

 the existence of species which have hitherto rested upon isolated 

 examples, and thus establish them more securely. Our know- 

 ledge of the geographical distribution of these parasites is thus 

 enriched and we believe that the list is well worthy of publication. 



Cyclopoidci — Ascomyzontidae. 

 Dermatomyzon nigripes (Brady). 

 A single female was captured while swimming freely amongst 

 algae north west of Spitzbergen. This species was first described 

 by Brady and referred to his genus Cyclopicera. It was after- 

 ward made a new species by G. 0. Sars under the name 

 Ascomyzon thorelli, which becomes a synonym of the name 

 given above. In spite of the fact that all of the specimens thus 

 far obtained have been swimming about freely, the structure of 

 the mouth parts shows clearly that this copepod is parasitic. 



