i 



CHAPTER XV. 



DEVELOPMENT OF THE PRIMORDIAL FORMS OF LIFE : 



THEIR RELATIONSHIP TO ONE ANOTHER, 



Evolution. Simple and Compound. States of Matter favourable to 

 Compound Evolution. Living Matter. Its Qualifications and its 

 Changes. Von Baer's Law. - Tendency to Differentiation. This 

 observed to be a Tendency to 'Organisation.' It is inherent in 

 'living' Matter. Present Changes likely to be similar to Ante- 

 cedent Changes. Rate of Variation. Different according to Mode 

 of Nutrition. Vegetal and Animal Forms. Hints concerning 

 Nutrition of Amoebce. 



Nature of Bacteria. Their relationship to Fungi. Relations between 

 Bacteria and Torula. Causes which promote their ' discontinuous ' 

 Growth. Development of Bacteria into Fungi. Many different 

 forms of Torulte. These forms may ' breed true ' but are still 

 Interchangeable. M. Trecul's observations on Development of 

 Torulse. Variability at all Stages. M. Pouchet's Observations. 

 Interchangeability of Lower Fungi. New-born Matter may assume 

 the forms of Amoebae or Monads. Mutual relationship between 

 these and Fungi. Green Organisms. Transitions between Fungi 

 and Algae. Similar transitions between Fungi and Lichens. Rela- 

 tions of Desmids to Algae. Fundamental Kinship of all these 

 forms actually proved by Experiments. More Varied Forms which 

 appear in Ponds. Their Transformations. Dr. Braxton Hicks on 

 relationship between Algse, Lichens, and Mosses. Cohn's Re- 

 searches concerning Transformations of Protococcus. They tend to 

 abolish Classificatory Distinctions. Views previously announced 

 by Professor Grant. 



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