192 
Cysticlicola farionis 
that this difficulty is connected with the cause of the mortality, but 
males died with the same symptoms as females, though not in such large 
numbers. Since the spawning season finished this year there have been 
no deaths. Curiously, too, the rainbow trout are alone affected and not 
the brown trout. 
I am indebted to Mr Holland not only for the Nematodes but for 
many of the facts mentioned in this note. 
REFERENCES. 
Bose (1802). Histoire naturelle des vers, n. p. 37. 
Bunge (1890). Zeitschr. f. physiol. Chem. xiv. p. 318. 
Dujardin (1845). Histoire naturelle des Helminthes, p. 81. 
Fischer, G. (1799). Reils’ Arch. f. Physiol, in. p. 95. 
Gunther (1880). The Study of Fishes, p. 142. 
Rudolphi (1819). Entozoorum Synopsis, pp. 25, 245. 
Schneider (1860). Monographic der Nematoden, p. 105. 
Wright, R. (1879). Contributions to American Helminthology, Proc. Canadian 
Instit., Toronto, p. 1. 
