I 



^ to J* 



^^y obvi 



]i> 



^w out i 



loiisi 



Jt 





^s from 





^i"S Were 

 how 



u: 



he 



continoaiicf 



ained i 



"es which incfE 

 aps were 

 .rate and partij: 





in layer 



hickly inters^' 



i 



ark-brown o^«> 



diamete 



r. '■■ 



so-ca 



lied 



(« 



.( 



11' 



r 



^ 





non 







tbo 



fAF 



ili^I''^' 



i.^;i'' 



ha^ 



been f ■* 



TUB BEGINNINGS 01 LIFE, 



515 



originally described by Ehrenberg, who recognized that 

 the process of development went on within them at a 

 much slower rate than it did within such large ova or 



as are ordinarily produced within the adult 

 These gemmae also possess a smooth trans- 

 parent and very thin envelope_, whilst in the so-called 

 Masting or winter-eggs' the external surface is ^ hairy' 

 or villous, and the envelopes are double^ in addition to 

 being much thicker and more opaque. 



aemmse 

 animal. 



After some careful investigation^ I ultimately ascer- 

 tained that every interrnediate stage was to be seen, be- 



r 



tweenthe spherical or ovoidal heap of green Chlorococcus- 

 corpuscles (Fig. 93, a) and the fully-formed winter-egg 

 containing an embryo Hydatina, whose ciliary wreaths 

 were in full activity. The steps of the transformation 

 were as follows : — The mass of aggregated algoid vesi- 

 cles assumed a preternaturally bright-green colour, and 



id was in them:: 



and theyalso^;' some of the corpuscles seemed to fuse with one another. 



owing to a solution of their thin envelopes — so that the 



r 



masses after a time presented a more granular appear- 

 ance. Decolourization then seemed to commence 

 and proceeded rapidly throughout the portion of algoid 

 matter which was destined to form the future ^egs;' 



2 "0^0 



in 



always involving an ovoid mass about 

 diameter;' The external limits of this transformation 

 were always sharply defined, and 1 have seen many 

 bodies in this early stage in which the future egg was 

 represented by an opaque ovoidal mass of rather dark- 

 brown granular matter, to which no bounding membrane 



L 1 % 



■ 



