I 



494 



THE BEGINNINGS OF LIFE. 



slowly increased in size^ whilst at the same time the 

 cyst-wall became thinner and thinner- and the con- 

 tained masSj after having assumed a mamellonated 

 app^arance^ again became finely-granular {c^ d). After 

 a time the embryos began to rotate within their cysts^ 



4 



although at this stage no cilia were to be detected. 

 Such changes were frequently observed^ but it 

 some time before M. Pineau was enabled to make out 



was 



The infusion contained^ in 



any further alterations. 



addition to the multitudes of Vorticelte^ a crowd of 



much more minute organisms^ 

 included Monads and small An 



amongst which v/ere 

 xbie. But there were 



h 



also some large specimens of Oxytrichse^ whose dimen- 

 sions far exceeded that of any of these other organisms. 

 The mode of origin of the Oxytrichse was for a time 

 just as obscure as the ultimate changes undergone by 

 the contents of the Vorticella cyst^ till at last M. Pineau 

 discovered other spherical bodies (e) in the midst of a 

 mass of the oviform cysts^ equal in size to the largest of 

 them^ ^ mais denues d'enveloppe^ et munis de cils gros et 

 rareSp qui rapellaient entierement ceux des Oxytriques; 



1 



1 



SI 



c^ 



^ n'est que leur mouvements etaient lents^ et 



que leur consistance paraissait plus molle/ M. Pineau 



—^Sur d^autres globules^ les cils formaient, en 



adds: 



outre^ une bande diagonale^ indice de celle qui accom- 

 pagne la bouche chez les Oxytriques entierement deve- 



loppes Enfin on en voyait qui afFectaient des 



formes plus ou moins ovalaires, de telle sorte qu'on 

 arrivait par des transitions insensibles a la forme de 



^,-=J 



^ 



Transformati 



d-i. Represer 

 Oxytr 



seeni 

 Oxvt] 



J 



'fitliin the \ 



1 



lie 



proce 

 ^''^1^^, and 



ss 



: 





en 



sonie 



c 

 « now i^r 



Vicha , 



See 



M 



%. . 





