Bemerkungen zu Coprozoic Flagellaten: Zusammen mit einem Vorschlag, die Bedeutung der Kinetonucleus in der Binucleata. Platte 26. Abbn. 1-3, Monas vulgaris.-Abb. 1, Small Form. Abb. 2, Large Form. Abb. 3, largeindividual in der Division. Abbn. 4 - 6. - Verschiedene Personen der Proleptomonas fiBvimlu. n. g.. n. sp. Abb. 7.-- Copromonas ruminantium, n. sp. Abbn. 8-12, Cercomonas longicemda, - Abb. 8, leicht fleckig, thedifference in der Dicke der beiden tfagella zu zeigen; der Schwanz - fiagelhim nicht befollowed, wo es entlang der Körper läuft (aber der. Feigen. 48-53). Abbn. 9 - 11, Division

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Observations on Coprozoic Flagellates: Together with a Suggestion as to the Significance of the Kinetonucleus in the Binucleata . Plate 26. Figs. 1-3, Monas vulgaris.— Fig. 1, small form. Fig. 2, large form. Fig. 3, largeindividual undergoing division. Figs. 4—6.—Different individuals of Proleptomonas fiBvimlu. n.g.. n.sp. Fig. 7.-—Copromonas ruminantium, n.sp. Figs. 8-12, Cercomonas longicemda, —Fig. 8, lightly stained individual, to show thedifference in thickness of the two tfagella ; the tail-fiagelhim cannot befollowed where it runs along the body (but of. figs. 48-53). Figs. 9—11, dividing forms: fig. 9 has only a single nucleus, the other deeply stainingbody being an ingested food-mass. Fig. 12, late stage in conjugation(cf. text-fig. 0 9). Figs. 13-19, Phyllomitits undulans.—Figp. 13—16, individuals of different sizes.Figs. 17 19, dividing forms; in fig. 17 the nucleus is still single but aboutto divide ; the other deeply staining bodies are ingested food-masses(of. tigs. 13 and IG). Figs. 14 and Hi show the oral groove.. Plate 27. Figs. 20-28, Spvromonas angusta.—Figs. 20 and 21, minute forms. Fig. 22, youngspiral. Figs. 23-25, spirals. Fig. 26, stout spiral transitional to bean-form.Figs. 27 and 28, large beans. Fig. 27 sliows well the apparent clear areain the hinder part of the body, filled with secretion or secreted granules(cf. figs. 59-63). Fig. 28 is probably a bean becoming rounded prior todivision; it may be slightly flattened. Figs. 29—31, Heteromita globosa.—Figs. 29 and 30, single forms; that of fig. 30 isvery large. Fig. 31, late stage in conjugation, very similar to the corre-sponding stage in Cercotnonas (cf. figs. 12 and 54), except that there areapparently two karyosomes, not yet united, in the synkaryon (cf. alsofig. 74). The paler bodies in the cytoplasm represent ingested cocci, etc., which are quite distinct from the characteristic numerous small granules. Figs. 32-38, Heteromastix, n.g. (cf. lens?).—Figs. 32-34 are

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