54 



G. 0. SARS. 



[Xo. 1. 



not only with the youug produced from the usual fertilized ova 

 but also with those developed from unfertilized eggs, as shown 

 by von Siebold in the case of Artemia; aud I have also myself 

 had an opportunity of observing the same in Limnadia. 



b. Development of the „ Winter-eggs" . 



In regard to this important point, I cannot, I am sorry to 

 say, at present state anything with certainty, having not yet had 

 opportunity of watching this part of the ontogeny in the present 

 form. I can only suggest, as a mere hypothesis, that this deve- 

 lopment may be wholly different from that of the ,,summer-eggs". 

 as described above, and in all probability connected with a true 

 metamorphosis, as in other known Phyllopoda. Perhaps I shail 

 subsequently be enabled to throw some light upon this as yet 

 imsettled question. 



