34 EISEN. [Vol. XVII. 



Parachromatic Granules. — As parachromatic granules I 

 designate a class of dark-staining granules which, during the 

 resting stages of the polymorphous nucleus, are found in the 

 vicinity of the chromoplast (Figs. i-8). These granules stain 

 in the same manner as the chromoplasts, and I have not been 

 able to differentiate them by color. When the leaders are 

 formed these granules are the first ones to join the leaders, and 

 it suggests itself that possibly they furnish the necessary chro- 

 moplasm for the leaders. But as the aggregate of all these 

 parachromatic granules does not equal the mass of the chromo- 

 somes we must suppose that, if the parachromatic granules 

 furnish the chromoplasm, they cause it to be evolved and that 

 they do not furnish it alone from the amount stored in them. 

 The parachromatic granules are of various sizes and forms and 

 vary also as regards number. With certainty they are only 

 found in the polymorphous cells. 



Linoplasts, or True Nucleoli. — The linoplasts are that kind 

 of nucleoli which supply and nourish the linin during certain 

 stages of the mitosis. When properly differentiated with congo 

 they appear rather transparent and of a reddish-orange color. 

 They are thus readily distinguished from the chromoplasts 

 which take the iron-haematoxylin stain with great avidity. 

 The number of linoplasts is variable ; sometimes we find only 

 one, sometimes again there are five or six. In the auxocytes 

 the linoplasts are most numerous just before the stage in 

 which the spireme segments are split, after which they gener- 

 ally disappear. Rarely one is left at the metaphase, and when 

 this is the case it is thrown out into the cytoplasm and evi- 

 dently dissolved. During the separated spireme stage the lino- 

 plasts are seen to dissolve, apparently giving off particles to the 

 linin network (Figs. 12-17, especially 14. c). This is also the 

 very period when the largest quantity of linin is required for 

 the pulling apart of the two halves of the spireme segments. If 

 we to this observation add the one that the linoplast consists of 

 apparently the same kind of granula as the linin network, both 

 as regards size, form, staining reaction, etc., we are, I think, 

 justified in assuming that the linoplast actually does furnish the 

 extra linin required for the pulling apart of the spireme leaders. 



