xii CONTENTS 



PAGE 



4. Thermal Death Points of Species of Yeasts 168 



5. Temperature Limits and Optimum Temperature for Spore Formation . . . 168 



6. Sexuality, Morphological Characters of the Ascs and Ascospores, Germina- 



tion of Ascospores 170 



7. Temperature Conditions for Scum Formation and Ring Formation 171 



8. Macroscopic Appearances of Cultures on Solid Media 173 



9. Giant Colonies 174 



10. Biochemical Activities of Yeasts ' 174 



11. Methods for Determination of Species Torula, Mycoderma and Patho- 



genic Yeasts 176 



CHAPTER VIII 



VARIATION OF SPECIES 



1. Morphological Variations 178 



a. Temporary Variations. Polymorphism 178 



b. Permanent Variations. Polymorphism 179 



2. Physiological Variations 184 



CHAPTER IX 



CLASSIFICATION OF THE YEASTS 



1. Family of Saccharomycetes " 193 



a. First Group 193 



6. Second Group 193 



c. Third Group 194 



d. Fourth Group 195 



e. Fifth Group 195 



2. Family of Non-Saccharomycetes 196 



CHAPTER X 

 FAMILY OF NON-SACCHAROMYCETES 



First Group 



GENUS I. Sdhizosaccharomyces. 



Schizosaccharomyces octosporus 197 



" Pombe, Lindner 199 



mellacei, Jorgensen 200 



asporus, Eykmann 202 



" aphalarae calthae, Sulc 202 



Formosensis, Nakayaza 203 



" Sautawensis, Nakayaza 204 



Nokkoensis, Nakayaza 204 



" chermetis abietis, Sulc 205 



