Fig. 69. Chloroform Drops Surrounded by a Shell op 



Glass Fragments 



The sketch indicates now the glass fragments tightly surround and 

 enclose the chloroform which also has taken on various irregular elongated 

 shapes. (Magnified 5 times.) 



Shell of 



Pseudapodmm 



Fig. 70. Difflugia Pyriformis 



For comparison with the chloroform here is a diagrammatic (a) and a 

 surface view (b) of one of the most common species of Difflugia. (Mag- 

 nified 100 times.) (From Hegner, Invertebrate Zoology, New York, 1933.) 



173 



