x TABLE OF CONTENTS 
CHAPTER VI 
THE SEGREGATION OF THE GERM CELLS IN NEMATODES, 
Sacirra, AND OTHER MeEtTAzoa 
1. The Keimbahn in the Nematodes, 174. 2. The 
Keimbahn in Sagitta, 179. 3. The Keimbahn in Other 
Animals, 183. 
CHAPTER VII 
Tue Germ CELLS oF HERMAPHRODITIC ANIMALS 
CHAPTER VIII 
KeEIMBAHN-DETERMINANTS AND THEIR SIGNIFICANCE 
A. The Genesis of the Keimbahn-Determinants, 
211 (a, Nuclear, 213; b, Cytoplasmic, etc., 224; c, Dis- 
cussion, 228). B. The Localization of the Keimbahn- 
Determinants, 235. C. The Fate of the Keimbahn- 
Determinants, 240. 
CHAPTER IX 
Tur CHromosomEs AND MitocuonpRia oF GERM CELLS 
The Chromosome Cycle in Animals, 245. The Mito- 
chondria of Germ Cells, 275. 
CHAPTER X 
Tue Grerm-pLasm THEORY 
REFERENCES TO LITERATURE . 
InpEx oF AUTHORS . 
INDEX OF SUBJECTS . 
189 
211 
290 
311 
337 
341 
