SPERMATOGENES1S OF EUCHROMA GIGANTEA. 1 7 I 



itpcndra at a period when in Euchroma it is condensing 

 (Plate- III., Figs. 3 and 4). In Scolopendra there i- likewise a 

 kar\o-phere present in the spermatogonia, wherea- it i- Inking 

 in I: in hrti ni<i. 



\ -onieuhat different condition is described by Eisen (1901 > 

 for Hulniilniseps. A karyosphere (chromoplast) is present in 

 tin-, obj t. .\i fir-t it lies free in a vacuole, but later appear- 

 tttrai i "leaders" which might be compared to the radiating 

 - of l-.uchron:.: I igs. I I -12). 



Through the-e. leaders small particles of chromatin are pn>- 

 jei led into the karyosphere and again emerge from it. The cm- 

 the Naders towards the karyosphere apparently 

 corresponds t" a -\napsis stage, and as they finally break apart 

 eat h i hroiiio-oin.il thread receives a portion of the karyo>pln n 

 \\hiih i- ^radnalK di-t ribiited through the length of the thread 

 Plate Ml I b and c). 



'I lie ("iidition in echinoderm eggs treated with Mg salt- 

 \\il-on. [901 and in normal mouse eggs (Sobotta, 1895) is 

 in -nine i imil.ii t" that of Euchroma, for although then 



i- ,i|ipan nil paration of liniii and chromatin, the kary>- 



^]>here bre.ik- up din i ilv into the mitotic chromosomes (Plate 

 111, FigS. 5. </ ami b). 



What l.e.iiiiu have these facts on the question of the indi- 

 \idnalit\ <-t the chromosomes? In the pajxT on Sarracenia 1 

 suggested that tin- phenomena there "might be explained on 

 the a--mnptioii that the morphological basis of the chromosomes 

 remain- in the linin \\hile that portion of their substance which 

 caii.-c- i hem to col,, i deeply is absorbed by the nucleolus. It 

 .i -imilar inti r|.retaiioit be applied to the case of Batrachoscf^, 

 it \\ill In- - en that tin linin retains its individuality more clearly 

 than the hromatin. \\hich may be transferred to the kary- 

 >pheie. In the m\riapi.ds there is apparently no separation ot 

 chroin.it in .UK! linin, but a tight coil of threads, consisting ol 



I r work on Batrachoseps. remarks: "il imu-. 



i|ii<- 1,-- ]>lastes resultaient de la soudure tios intim-- dea 



in.i-,. in. i laveur de rapprochement." "II semble qu'un, 



-t.in.r inti-11-.fiiifiu -i.l> n.pliilc. une sorte de nucleine, soit venue etnpau-r t,.ut 

 1.- poll- ,!i- l.i tii^iiii- K litre ace moment. II se pi-ut qu -, la d'un t-x<u>lat 



i lit,. in- ix-inOiues." 



