520 THE BEGINNINGS OF LIFE. 



forming in close proximity to one another, each of them 

 being still without any trace of an investing membrane ; 

 and it so happened that a Euglena, lying between them 

 where they approached each other most closely, bad partly 

 been included within each of the future c eggs.' One -third 

 was decolourized on each side, so that this Euglena ac- 

 tually entered into the formation of each of the c eggs,' 

 whilst the middle third of its substance, including the 

 red eye-speck, remained as bright as it had ever been ! 



The c eggs' of Euglena origin differed from those 

 produced from Chlorococcus by being not at all villous, 

 and by not possessing a double envelope; whilst they 

 differed from the gemmx of almost similar size, sub- 

 sequently produced by the Hydatina, principally by 

 reason of their more opaque appearance and browner 

 colour. The c gemma*,' in fact, not only have a lighter 

 and more evenly granular appearance when examined 

 by the microscope, but are also easily distinguishable by 

 the naked eye, owing to their white colour. The < eggs 3 

 of Euglena origin seemed to undergo developmental 

 changes more rapidly than those derived from Chloro- 



ovoid egg, 5^" in breadth by ^" in length, with sharply defined 

 border and no remains of Euglenae on its [upper] surface.' My avoca- 

 tions during the day have generally rendered it impossible for me to 

 carry out attempts at development satisfactorily. Moreover, the 

 changes ' in conditions ' which are necessitated by any such attempts have 

 generally been found, as above stated, to check or change the direction 

 of future development. Even in this case, the egg-like body produced 

 was much smaller than usual. The first body observed appearing as 

 a spherical mass was probably a very large * egg,' seen endwise. 



