THE BEGINNINGS OF LIFE. 



527 



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

 incroyables peuvent etre revoquees en doute, mais 

 les sceptiques changeront peut tre d'avis apres une 

 observation quotidienne de trois mois. 3 Every one who 

 looks must not, however, necessarily expect to see 



FIG. 94. 

 Origin of Nematoids from Euglense. (Gros.) 



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



one of the halves has become decolourized. 



b. 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 1 : 

 c Cette generation directe de Nematoides ne s'e'tait 

 pas vue Fannee derniere. Les dernieres generations 

 de Rotatoires seulement avaient donne des vers.' 



Quite recently I have myself had the good fortune to 

 i Loc. tit., p. 477- 



