LIST OF ILLUSTRATIONS. ix 



Fig. Page 



82. Modes of origin of Desmids and Diatoms.. .. .. 417 



83. Origin of Euglense from the Cell-contents of a Conferva 



(Gros) 421 



84. Resolution of Euglense into Smaller Organisms .. .. 438 



85. Origin of Diatoms, Desmids, Pediastrese, and Algge from 



Euglenae and other Vegetal Matrices (Gros) .. .. 447 



86. Modes of Origin and Development of Ciliated Infusoria . . 463 



87. Development of Infusoria from the Protoplasm of Chara 



(Nicolet) 476 



88. Mode of Origin (?) and Development of Otostoma (Carter) 481 



89. Arcellse and Peranema derived from Pangenesis of Rotifers 



(Gros) 486 



90. Transformations of Ciliated Infusoria (Pineau and Haime) 495 



91. Conversion of Encysted Euglena into Rotifer (Gros) .. 508 



92. Origin of similar Rotifers from Vorticellse and by direct 



Transformation of Algoid Corpuscles . . . . . . 511 



93. Transformation of a mass of Chlorococcus Corpuscles into 



the 'winter eggs' of Hydatina senta .. .. .. 516 



94. Origin of Nematoids from Euglense (Gros) .. .. 527 



95. Development of Nematoids from Spores of Vaucheria .. 531 



96. Homogenetic Pangenesis in Tardigrades (Gros) .. .. 550 



APPENDICES. 



Sarcina and allied products from Solutions containing 



Ammonic Tartrate and Sodic Phosphate . . . . iv 



Mass of Spiral Fibre from a Solution of Ammonic Tartrate 



and Sodic Phosphate . . . . . . . . . . vi 



Embryonic Spiral Fibres from a Solution of Ammonic 



Carbonate and Sodic Phosphate . vii 



Sporangium-like body amidsfc mass of Spiral Fibre .. ix 

 Spiral Fibre with Sarcina-like bodies attached, from a 



Solution of Sodic Silicate and Ammonic Phosphate .. xiv 

 Spores and Filaments similar to those found within Crystals* 



of Ammonic Tartrate . . xviii 



