- 4!) 



all. The chromatic basis presoiils only ili<' Imsal. lhick(U' and 

 more iiitoiisoly staiiiaMc portion of ihc momhrain'. 



\i the antcri<»r tiid ol the Itody of Giiimitomotuis, to the 

 ri«iht Irom the startiii.^' point of the umiul.iliiii;- inemhr.ine, 

 there is a sli;^-htly developed cytostume. It has the shap(^ (d' 

 a small hollow, the jjrotrudin^' cd<^-e of wiiich forms the liji 

 (tab. f. fi--. '.» and 10). 



The luiclens of Gificnitomonas is sitnatecl at the anterior 

 end (d' tile body, directly under the commencement of the 

 membrane, to the i)ase of whi(di it is closely attached. The 

 nucleus is usually very poor in chromatin. Kucinsi<y (-it;) 

 nuirks the same in the nucleus of the Trichomonads. 



It is remarkable that notwithstanding such a scarcity of 

 chromatin the nucleus continually casts oui into the surro- 

 unding protoplasm a considerable quantity of material stai- 

 ning like chromatin. This material is })roduced from the sur- 

 face of the nucleus in the following manner: the stuff cast 

 out appears to have the consistence of a dense, viscous fluid; 

 the latter first forms a thin film with large apertures at a cer- 

 tain portion of the nucleus membrane; then this film thickens 

 (tab. 1, fig. 12), and flows together to form a hood placed on the 

 nucleus. Further, the hood becomes more and more prominent, 

 and a part of it becomes severed from it in the form of a 

 homogeneous oval body (tab. I. fig. 11). The latter first lies 

 near the very nucleus, but later It migrates to the 

 posterior end of the body. There the oval body is absorbed, 

 as it seems. The appearance of a light zone around it speaks 

 in favour of that view (the body seems to melt). In the 

 meantime the hood of viscous stuff, remaining on the nucleus, 

 grows larger, and casts off a new oval body to take the place 

 of the first. 



As concerns the morphological significaiice of the oval 

 bodies, they may be best of all compared to the karyosome, 

 in my opinion; especially to the karyosome of (iregarines, for 

 instance. The resemblance to the karyosome is also supported 

 by the fact of small vacuoles (as in the karyosomes of (hv- 

 garines) having l)een sometimes observed inside the hood 

 which gives origin to the bodies,— as well as by the semi- 

 liquid, viscous (diaracter of the oval bodies. I have often obser- 

 ved that the karyosome of some grerarines {Cystobia cJiiri- 

 dotae Dog.) flows on the interior side of the nucleus-mem- 



