::: TOE 



oo the whole that of a typical celtaucfeus, but is subject to very great 

 not only in different animals, but also in different stages of 

 nesy as in the echinoderm ovum, the chro- 

 beautifol and regular retkruhim consisting of numer- 

 aspended in a network of finin (Fig. 58). 

 no true retknbr stage exists, the nucleus containing 

 the whole period of its growth the separate daughter-chro- 

 of the preceding division (copcpods, selachians, Amphibia^ 1 



5 

 &$ 





= 



~.~- '- ~. '. -- --. . ~ ~ ~: -" ~ "-. - " '-" 'L~. it7i " ~~- ~:'. ~. -~. :c.~^ : riinirv 

 "i i ~,\ ^ .\.. ~~~.~- ~~-ji. !.._!_. i"-r "r i -~ . r. ii '_! r". r. ^r ~ ~. ~ ^~ ~. ~~~~-~. " r 

 t ^y a. verv mueres&n^^ aiKft- pni^^yfa^tl jia^t ~ ~ : ~ 



1 ~ f: . _1 -~ i . ~~ ]~. ~- ~. ~~~. ' ~ ~.7.^. . ~ .~ ~~ ^~.'.~- "I 

 --^- _~ JL "; ."-"!. ~. ~.~-~,~ '.' ' 1 i.7 ^17. ^f . _ 1 -". 'HI . "-" ir.1-" 1 



degenerate, or by being cast out and degenerating at 

 the time the polar bodies are formed (Figs. 97, 128). 

 of the egg-ceil is, as elsewhere, a 



srJD imperiecdT understood. It often attains an enormous 

 the "Keimneck~ or "germinal spot" of the 



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