﻿I 



i 



r 



1903] PRIMARY NUCLEUS IN SYNCHYTRIUM 4^5 



left; a shrinkage in the size of the nucleus is marked in passing from^f^. j to 

 figs. 6-y and succeeding figures. 



Fig. 8-9. The linin commences to aggregate near the center of the 

 nucleus; shrinkage continues and dissolution of the membrane proceeds. 



Fig. 10. Linin threads assume spindle form ; shrinkage continues and with 

 it increase in the thickness of the layer bounding the nucleus. 



Fig. II. Well defined spindle surrounded by residue of the membrane, 

 now a mass of substance staining densely with the orange G ; chromosomes 

 near equator and several nucleoli present. 



Fig, 12. Chromosomes passing toward poles. 



Fig. 13. Chromosomes at the poles. 



Fig. 14. Constriction of the nuclear spindle at the equator preparatory 

 to final separation of the daughter nuclei. 



LITERATURE CITED. 



Dangeard, p. a.. '90 : Recherches histologiques sur les champignons. Le 



Botaniste 2 : 61-150. //5.J-6. 1890. 

 DeBary, a., and Woronin, Mich., '65 : Supplement a Thistoire des Chytri- 



din^es. 



Q-IO 



Oltmanns, Fr., '89: Beitrage zur Kenntniss der Fucaceen. Abhandl. 



Gesam. Bot. 14: 1-94. p^s. 1-13. i88g. 

 Rosen, F., '93: Beitrage zur Kenntniss der Pflanzenzellen. IL Studien 



iiber die Kerne und die Membranbildung bei Myxomyceten und Pilzen. 



Cohn's Beitrage zur Biol, der Pflanzen 6: 237-266. ph. 2-3. 1893. 

 Stevens, F. L., '99: The compound oosphere of Albugo Bliti. Bot. Gaz. 



28: 149-176, 225-245. ph. Ji-i3> 1899. 

 '01 : Gametogenesis and fertilization in Albugo. Bot. Gaz. 32 : 77- 



98, 157-169, 238-261. ph, 1-4. igoi 



