_Trypanosoma Ziemanni_, from the gut of the gnat (_Culex_), having been sucked in with the blood of the owl (_Athene noctua_). A, fertilized vermiform stage. B, multiplication of nucleus. C, elongation and coiling, with increase of nuclei (_after_ Schaudinn).] [Illustration: FIG. 53. Minute neutral Trypanosomes in the gut of the gnat liberated from the coiled form of Fig. 52, C (_after_ Schaudinn).] It is not possible here to give a full report on Dr. Schaudinn’s work; but it appears that he has studied two distinct species of trypanosoma, both occurring side by side in the blood of the little stone-owl, and already seen but incompletely studied, by Danilewsky and Ziemann. The second of the two species of trypanosome is in some respects the more remarkable. Schaudinn calls it _Trypanosoma Ziemanni_; and from the figures which are here given (figs. 4, 5, 6, and 7), copied from his article, with the explanations below the figures, the reader will at once see what an extraordinary range of form and mode of multiplication is presented by this one species of trypanosome. Space will not permit us to comment on these various phases beyond noting how assuredly such forms would have escaped recognition as belonging to the trypanosome history if seen, before Dr. Schaudinn’s memoir was printed, by any of our medical commissioners blindly exploring round about the diseases caused by trypanosomes in man and mammals. [Illustration: FIG. 54. A, B, C, D, Elongated spiral forms of _Trypanosoma Ziemanni_ (some intertwined) developed from those of Fig. 53--showing transverse division, nucleus, and blepharoplast. E, F, pear-shaped forms resulting from the contraction of forms like A; G, a cluster of very minute individuals. These forms are observed in the gnat and also in the blood of the owl, into which they pass when the gnat bites that bird, and there give rise to the large male and female Trypanosomes seen in Fig. 55 (_after_ Schaudinn).]