84 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



The Classes in .Biology at P i e 1 . 



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 



