THE BEGINiVIiVGS OF LIFE. 



527 



un vigoureux vermicule.' And he adds: — 'Ces choses 

 incroyables peuvent etre revoquees en doute, mais 

 les sceptiques changeront peut etre d'avis apres une 

 observation quotidienne de trois mois.' Every one who 

 looks must not, however, necessarily expect to see 



^'^^j-'IH-v 



Fig. 94. 

 Origin of Nematoids from Euglenae. (Gros.) 



a. A large Euglena which after encystment has undergone fission, whilst 

 one of the halves has become decolourized. 



h. A Euglena which has become converted into a decolourized em- 

 bryonic mass, leaving only a small coloured remainder. 



c. Another decolourized mass, which, after undergoing certain changes, 

 becomes converted into a young Nematoid, as at d. 



e. A female specimen of the developed Nematoid three weeks old, in 

 whose ovaries two partially-developed ova are seen. 



these particular transformations. Dr. Gros says M — 

 ^Cette generation directe de Nematoides ne s'etait 

 pas vue I'annee derniere. Les dernieres generations 

 de Rotatoires seulement avaient donne des vers.' 



Quite recently I have myself had the good fortune to 



^ Loc. cit., p. 477. 



