5i8 



THE BEGINNINGS OF LIFE. 



/ 



inversely proportionate to one another. In portions 

 that were green^, the algoid aggregations were numerous 

 and the *^ winter- eggs'* were scarce; whilst^ as more 

 and more decolourized portions of the previously green 

 pellicle were selected for examination^ the Yeggs' 

 increased in number and the green Chlorococcus-heaps 

 became scarcer and scarcer. 



But even before I had thoroughly satisfied myself 

 concerning this mode of origin of Hydatina^ I had had 

 evidence almost as convincing — which at the time 

 I could scarcely bring myself to credit — that these 

 splendid Rotifers are occasionally produced, in an 

 almost similar manner, from aggregations of small 

 Euglense^ entering into the composition of a Euglena- 

 pellicle. 



length, were apt to appear imbedded in the very 

 midst of the pellicle. They were somewhat variable 

 in size, and, like the bodies we have just been de- 

 scribing, they were more decidedly brown in colour than 

 those which are produced within an adult Hydatina. 



F 



The difference, however, was not nearly so marked 



r 



between the ordinary gemmse and the so-called ^ winter- 

 eggs "^ formed from the substance of the Euglena-pellicle, 



' derived from 



Brownish egg-like masses, about ^-J-/ i^ 



as between gemm^ and the similar ^ 

 Chlorococcus-heaps. But during the development of 

 such bodies in the Euglena-pellicle, there was the same 

 absence of an investing membrane in the early stages 

 as had been noted in tlieir formation from Chlorococcus 



F 



■ . - ^. About -t4tvk' iri' diameter. 



i 



10 



.lookir 



m: 



I The first of 1 



DOW in my posses 

 st I M-as still 

 wsmadeconcen 

 Uy, spherical ai 

 of a browni 

 into the 

 riich was colour 

 it [the egg-like 

 ot a dense aggref 

 F'*s. Althoi 

 perfectly spherica: 



|"y impressions c 

 influences s 



*-"^o that, a 



part; 

 sain, 



eemec 



"lit those 



W. A 



^^' Won , 



'S. and 



'^fentv 



y-fouj- 



