Nos. 455-456.] 



FASCIOLARIA. 



875. 



plainly reaching the end of their career. Though they 

 the time a part of a very young 

 embryo, the organ is no more an 

 integral part of the embryo than 

 are the embryonic membranes of 

 arachnids and insects, in which 

 amitosis is well known to be asso- 

 ciated with senescence. It is really 

 merely an embryonic structure. 

 It is not, however, clear that the 



active secretory function of these 3tme\itua"ttn Ts'^figtre'r 

 cells is a cause of the amitosis. If cieiin different stages of c 

 it were we should expect that in 



cells where it was taking place as actively as in the on( 

 3 at the bottom of the drawing should show amitosis, 

 it and the one over it are dividing amitotically. 



The food-ova present nuclear appearances of sufficient 

 to deserve mention. In the carhc 

 and still manifest cell ac 



in Fig. 

 hereas 



mbr)os (hi 

 ICS of then 



]5lasm of large size and con- 

 'cvtopi^mon'nl'''TLToldovrtacu^^^^ taluiug Within its membrane 



duton of the nucleus, cam. luc. X 600. ^^.^^ ^l^^^e CUSlomarV chvr)- 



matine network but instead a mass of bubbl) matciial (ti,^. 6) 

 if the chromatine had been converted into a fioth. Othui ^asL> 

 are met in which there are numerous small nuclei, as in 1 ig. <S. 



