12 
College of Forestry 
Figure 1. View from the ventral surface of Clinostomum mar- 
ginatum, from a specimen from the throat of Ardea herodias, fixed 
under compression in acqueous corrosive sublimate, stained in borax- 
carmine, magnified twelve diameters. From Osborne. (Reproduced 
by permission of author and Wistar Institute of Anatomy.) 
