CONTENTS IX 



CHAP. PAGE 



VIII. Macroformations — COIItd. 



(c) The Swarm of Proteus . . . . . . . . -135 



(d) Chlaniydobacterial Aggregates . . . . . . . • i3<^ 



(e) The " Medt4sa-Head " Colony . . . • • - • -137 



(f) Smooth Colonies 141 



(g) Rough and Smooth Colonies of Streptococci . . . . . ■ H^ 



(h) Colonies of Streptomyces ......... 142 



(i) Colonies of Caulobacteria ......... 143 



( j) Summary ........... 144 



IX. The Evolutionary Relationships of Bacteria 



(a) Morphological Evidence ......... i4<^ 



(b) Previous Classifications . . . . . . . . .146 



(c) The Ancestral Bacterium . . . . . . . . -150 



(d) Flagellar Pattern 151 



(e) Aerial Distribution . . . . . . . . . 153 



(f) Autotrophic Bacteria I55 



(g) Summary . . . . . . . . . . .156 



X. The Genetics of Bacteria 



(a) Genetical Confirmation oj Cytology . . . . • • -157 



(b) Genetical Evidence . . . . . . . . . 159 



(c) Summary ........... 160 



Index t6i 



