54 
SOME NOTES ON PARASITIC AND OTHER 
DISEASES OF FISH. 2nd Series. 
By G. HAROLD DREW, B. A. Cantab. 
Plate IX. 
TABLE OF CONTENTS. 
PAGE 
Introduction .......... 54 
Glugea shiplei, a new Sporozoon, parasitic in the muscles of 
Gadus luscus ......... 55 
Two cases of abdominal tumours occurring in Pleuronectes 
platessa .......... 57 
The occurrence of Fibromata growing from the opercula of 
Pleuronectes platessa .59 
A remarkable case of “ vitreous ” degeneration in the muscles of 
Gadus aeglefinus, due to sporozoon infection ... 59 
A case of Epithelioma papulosum in Pleuronectes platessa . . 60 
References ........... 61 
Introduction. 
Most of the specimens described in the following notes were collected 
by the International Fishery Commission’s S.S. Huxley, in the North 
Sea, during the years 1905-09. They were preserved in dilute formalin 
in sea water, or in Bless Fluid. Owing to the length of time during 
which the specimens had remained in the preservative, and in some 
cases owing to their large size, the fixation and preservation were not in 
every case as perfect as might have been wished, so that many of the 
finer histological details could not always be determined. 
Only an account of the actual conditions found is given here. In 
the absence of opportunities for experimental work it is impossible to 
enter into the etiology or pathology of the diseases. 
