(Ee ROU Pies 
OR 
WHEEL-ANIMALCULES. 
BY 
Cc. T. HUDSON, LL.D. Canras. 
ASSISTED BY 
P. H. GOSSE, F.RBS. 
WITH ILLUSTRATIONS. 
IN TWO VOLUMES. 
PLATES. 
LONDON : 
LONGMANS, GREEN, AND CO. 
1886. 
All rights reserved. 
