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The ‘Classes in Biclogy at’ Paes 
I have also received from Mr. Scott a report upon 
the other work and the leading events of the year at our 
Piel establishment. It will be found below, and consists 
mainly of a record of the practical classes held in the 
laboratory, and of the visits of scientific men, and other 
Sea-Fisheries and Educational Authorities. 
Our Fisheries Exhibition is still on view at the Piel 
Laboratory, and is a useful adjunct to the teaching 
resources. It can, however, be sent out on loan, as 
formerly, when required; and any public institutions 
within the contributing counties desiring to show the 
exhibit should apply to the office at Preston for a copy of 
the conditions upon which it may be obtained. 
Fish Parasites and Diseases. 
Some time ago I suggested to Mr. Scott, who has 
been working for years, at odd moments as opportunity 
offered, upon the parasitic Crustaceans of our seas, that 
he should extend his observations to the parasitic worms 
and other lower animals that may cause diseased condi- 
tions, and give us a list of all the fish-parasites he was able 
to detect. A first, and very considerable instalment, 
appears below, consisting of four Protozoan, ten Trema- 
tode, one leech and forty-six Copepod parasites, taken, as 
will be seen, from a varied assortment of fishes, and from 
very different positions in the body. The Cestodes (tape- 
worms) and Nematodes (thread-worms), not included in 
this paper, will follow on some future occasion. 
Mr. H. M. Woodcock, of University College, London, 
has examined for us two of the Protozoan parasites, and 
contributes a useful paper on “ Myxosporidia in Flatfish,” 
which enumerates all these parasites which have yet been 
