ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
463 
the nucleus. From the early stage of infection up to the cystic form 
numerous transitions could be traced. The bodies resembled Protozoa 
by their mode of development at different stages, and by the spontaneous 
movements they evinced when heated on a slide. The author thinks 
that any one conversant with protozoic infection in animals would easily 
recognize these corpuscles. 
Infusoria of Diarrhoea.* — Dr. E. Poos describes some Infusoria which 
he has found in cases of diarrhoea. In the first were Flagellata, called 
by Grassi Megastoma entericum , Trichomonas intestinalis, and encysted 
forms of M. entericum. In the second Balantidium coli, and in the 
third Cercomonas hominis. In the fourth an awl-shaped Infusorian 
14-16 /a long and 3-4 /x broad. This was actively mobile, possessed an 
oral aperture surrounded by cilia and also a nucleus. 
^ The author recommends that the pan containing the recently passed 
stool should be placed inside another filled with hot water, in order to 
prevent the Infusoria from catching cold, and that the stools should be 
examined as soon as possible, for changes in the chemical reaction 
soon kill Infusoria. 
Dimorpha mutans.f — Herr F. Blochmann was so fortunate as to 
discover some examples of this remarkable form. He is able to confirm, 
in general, the description of its discoverer Gruber, and to add some 
important details. There are six to ten small, superficially placed con- 
tractile vacuoles, and a slow streaming of the granules was observed in 
the pseudopodia. The presence of axial filaments is particularly 
interesting ; they converge to a central point, where lies also the origin 
of the two flagella. The substance of the nucleus exhibits a distinct 
radial striation, and the rays appear to pass into the axial filaments. In 
prepared specimens the protoplasm may be seen to be separated from 
the nucleus by a distinct cleft. 
As matters of more general interest we may note that it is now 
certain that flagella are not connected only with the outermost layer of 
protoplasm, but have a deeper origin. The fact that the axial filaments 
of the flagella and those of the pseudopodia arise from the same central 
granule affords support to Biitschli’s view of the close relation between 
flagella and pseudopodia. Dimorpha is clearly more closely allied to 
the typical Heliozoa than was supposed, though its relations to the 
Flagellata are not loosened. The forms recently placed by Klebs in 
the genus Dimorpha should be placed in a new genus, for which the 
author proposes the name of Dimastig amoeba. 
It must not be thought that pseudopodia are never found in typically 
flagellate forms ; Herr Blochmann has observed them in Monas 
vivipara. 
Minute Structure of Pelomyxa palustris.J — Miss Lilian J. Gould 
has studied this freshwater Rhizopod by means of sections. The pro- 
toplasm surrounding the vesicles was not homogeneous, but showed very 
distinct structure. The examination of sections under very high powers 
lent strong support to the views of Prof. Biitschli as to the foam-like 
* Zeitschr. f. Klin. Med., 1892. See Centralbl. f. Bakteriol. u. Parasitenk., xv. 
(1894) pp. 610-11. t Biol. Centralbl., xiv. (1894) pp. 197-200 (8 tigs.). 
I Quart. Journ. Micr. Sci., xxxvi. (1894) pp. 295-301 (2 pis.). 
