— r^:\ — 



mass. The octoplasni is nior(3 or loss honi(t<j^eneous. .iii<l aitpmrs 

 to have a ratluT tiriise consistence. 



Alon.n' I lit' ccli^-cs ol' I he flattriKHl body the ectoplasm 

 forms pseudopodia-likeoutjj^niwt lis In I he shape (»r blunt, roundetj 

 swelling's. At one c\u\ of I he body the ectoplasm somelimes forms 

 several short, folded papillae of uid<no\vn function, \vhi(di 

 stain rather intensrlv with lleid r n h ain's hacmatoxylin (tab. 

 11. fi.u-. IS). 



The cndoplasm stains mon- intensely than the exterior la- 

 yr, and contains numerous, \ery small black (haematoxylin) 

 frranules. There are sometimes visible inside the body two 

 or three very large vacuoles, and sometimes there are nume- 

 rous minutest vacuoles dispersed in all the endoplasm. 



All kinds of food inclusions are, as a rule, absent (I saw 

 them only inside three individuals). 



Out of the constant celi-organoids in Mijxomonas <•! lype 

 A are found the undulating membrane, axostyle and nuc- 

 leus. 



The nucleus is mostly situated at the widened end of the 

 body, which 1, therefore, in analogy to the Trichomonads, 

 consider to be the anterior end. Although, in connection with 

 the amoeboid form of the body of Mi/xo/iionas, the nucleus 

 may be considerably displaced, sometimes being placed in the 

 middle of the body. The nucleus is large and has a regular spheri- 

 cal shape. The contents of th<' nucleus may have a very 

 varied aspect. Thus very often the nucleus contains a tender 

 linin network, all the chromatin being concentrated in the 

 large karyosome (tab. T, fig. I8j. The karyosome has the 

 shape of an irregular lump. The karyosome of Mi/xomonas 

 stands the nearest to that of the Gregarines. Just as in 

 Gregarines, there may be present in the nucleus instead 

 of one, two, three and sometimes even to five karyosomes 

 of smaller size (tab. II, fig. 17). And lastly, there are 

 specimens in which besides one large karyosome in the linin 

 network there are to be seen i or 2 small chromatin lumps: 

 these may be fragments fallen off from the karyosome (com- 

 pare analogous processes in Gregarines). 



In other cases the linin network surroumling the nucleus 



is very dense, and in the nodes of the network there are 



numerous large chromatin granules. Once, or twice I have 



observed that the whole nucleus consisted of large alveoles, 



10 



