TRANSACTIONS OF THE ROYAL MICRO- 
SCOPICAL SOCIETY. 
DESCRIPTION OF PLATE VIII, 
Illustrating Mr. Maddox’s paper on a Parasite from Caudal 
Nerves of the Haddock. 
1. — A portion of nerve with cysts ; the displacement of the nerve-fibres is 
well shown. 
2. — One of the parasites contracted and partially covered with cyst con- 
tents. 
3. — Parasite released from a cyst and in a state of progression ; the integu- 
ment is seen to be covered with short spines, beautifully arranged. 
4. — Parasite, dorsal aspect. po,p o', p o, p o' = vibratile organs, probably 
connected with a water-vascular system. 
These four figures X 40 diameters. 
5. — Portion of caudal nerve packed with cysts, x 25 diameters. 
6. — Parasite released from a cyst, x 40 diameters. 
Figs. 5, 6, from photographs ; the former obtained in seven seconds by 
artificial illumination with magnesium wire, the latter in fifteen minutes by 
paraffin lamp-light. 
