n 



?>90 



THE BEGINNINGS OF IIFE, 



ducts undergOjbear therefore a close resemblance to the 



metamorphoses witnessed by M. Nicolet (pp. 383-386). 



Mr. Carter has also described the mode of origin or 



appearance 



of certain ^tubulating germ cells/ which 



seem closely to resemble the peculiar fungoid growth 



Fig. 77, 



Formation of Pythium and of Astasise within cells of Spirogyra. 



(Reduced from Carter). 



a. Mode in which Pythium first appears. 



6. Corpuscles with tubes, through which the contained granules are 



voided. 



1 



c. Empty corpuscles after discharge of granules. 



d. Formation of Astasiee within a contiguous compartment of Spirogyra. 



e. A spore of Spirogyra, into which one of the tubules of an inosculating 



^roup of corpuscles (/) is penetrating. 



described by Dr. Pringsheim"^ as Tytk'mm entophytum. This 

 is represented as a colourless^ flask-shaped or pyriform 



+ 



organism^ with a more or less elongated neck ; and it is 

 stated to occur in both animal and vegetal tissues. 

 Mr, Carter says^ : — ^Just after the conjugation of Spro- 

 gyra^ a number of spherical cells filled with minute 



^ ' Ann. des Sc. Nat.' (Bot), 4 Ser. t. xi. pi. 7, fig. I. 

 ^ 'Ann. of Nat. Hist' vol. xvii. p. 113. 



f 





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 j tic ce!!, and tl 

 iis,' Cells of 

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