Opalina : its anatomy and reproduction, with a decription of infection experiments and a chronological review of the literature . ion, but it does suggest that the substance ofthe chromatin spherules may find its way into the endoplasmicspherules. This, is rendered still more probable by the fact mentionedthat in Hoplitophrya apparently similar refractive spherules arise inthe macronucleus and in the scattered groups of macronuclear gra-nules when the macronucleus fragments, Eefractive spherules somewhat comparable to those in the endo-sarc of Opalina are not rare among the Ciliata, Nydotherus
Opalina : its anatomy and reproduction, with a decription of infection experiments and a chronological review of the literature . ion, but it does suggest that the substance ofthe chromatin spherules may find its way into the endoplasmicspherules. This, is rendered still more probable by the fact mentionedthat in Hoplitophrya apparently similar refractive spherules arise inthe macronucleus and in the scattered groups of macronuclear gra-nules when the macronucleus fragments, Eefractive spherules somewhat comparable to those in the endo-sarc of Opalina are not rare among the Ciliata, Nydotherus andseveral species of Salantidium, present in the same hosts withOpalina, have many such refractive spherules in their endoplasma,which, however, seem alw^ays to stain darkly wdth iodine. Theyare not composed of true glycogen but are apparently paraglycogenof a somewhat different nature from that in the spherules of Opalina. Opalina. 271 It seems probable that some of the refractive bodies found in Fla-gellata and Foraminifera are of the same general nature. Thereseems to be something the same doubt as to the origin of the.
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