■^^K 



"' «f the U) 



I 



) 



■ithinthec|sti 

 ^t'ons of the 



^''y escape bat 

 ^lonadsi. ki 

 )bserved whi 



the most sceptiti 

 :ne?sedsuclitK 



Euglenx unit:;. 



I 



\ 



nclosedwitliiiifc 



I 

 the bodies so f 



zed and convex 

 the twin 

 only very 



I 



r 



3U2hatotherti 





\ 



;crie 



dW 



t 



rt 



jinaire 



et 



into 



* 





jy/^ BEGINNINGS OF LIFE. 



527 



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

 incroyables peuvent etre revoquees en doute, mais 

 les sceptiques changeront pent etre d'avis apres une 

 observation quotidienne de trois mois.' Every one who 

 looks must not, however, necessarily expect to see 



mSi 



Fig. 94. 



I 



r 



f 



Origin of Nematoids from Euglense. (Gros.) 



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

 one of the halves has become decolomized. 



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 ceitsin 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. 



n ■ 



L 



these particular transformations. Dr. Gros says ^ : 

 '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 



1 Loc. cit, p. 477. 



