[Reprinted from ‘‘ The Annals of Scottish Natural History,” July 1900. ] 
ON COPEPODS LIVING IN THE NOSTRILS 
Or FISHES. | 
By Tuomas Scott, F.L.5., etc. 
In the course of some recent researches on fishes and their 
parasites, I have on various occasions made an examination 
of the nostrils of fishes, and have frequently obtained free- 
moving Copepods within these organs, apparently living on 
the mucus that is usually present. Where this mucus comes 
from—that is, whether it is secreted by a special gland 
within the nostrils themselves, or enters into them from the 
outside skin of the fish—is a question about which, in view 
of a paper lately published in the Journal of the Linnean 
