32 Prot» 
PROTOZOA. 
excreta of the human subject to be referable to a single species, which 
assumes at different times the characters of Trichomonas^ Cercomonas^ and 
Amoeba. The monadic forms, viz., those connecting it with Amoeba, are in- 
distinguishable from swarm spores of Myxomycetcs. It is figured, pi. xviii. 
figs.j and its form, size, and behaviour towards chemical reagents de- 
scribed ; the fiagella vary from one to four in number, and may be seen 
to be formed and retracted ; the point opposite to them is that at which 
nutriment is taken in. Their presence is not peculiar to cholera ; they 
are absent in some pathological conditions of the intestine, especially 
in acid conditions of the alvine fluids associated with development 
of Oldium, and disappear from solutions in which this occurs. The 
Amceba-s,i 2 i,gQ may occur encysted, and may be either with or without 
nuclei ; these may occur as large bodies, and contain sporoid germs. The 
zoospores of the same form are found also in fresh cow-dung in India ; 
they pass through J.mo3Z>a-stages, and the Amcebce may unite to form 
large compound masses, the sporangia, which may contain a network 
representing a capillitium, and develop an investing membrane, and then 
break up into spores. Under the form of a large Amoeba, containing 
fusiform spores, it appears to bo very nearly allied to, if not identical 
with, Diplophrys stercorea, Oienkowski. Cunningham refers the form to 
the Protista provisionally, regarding it as a rudimentary Myxomycete 
organism, and assigns to it the name of Protomyxomyces coprinarius, 
which = Amoeba coli, Cercomonas intestinalis P, and Trichomonas spp , 
Zunker. 
GEEGARINIDA. 
Chief Works. 
36. Butsciili, 0. Kleine Beitriige zur Kenntniss der Gregarinen. 
Z. wiss. Zool. xxxv. p. 384, pis. xx. & xxi. 
37. . Beitrage zur Kenntniss der Fisch-psorospermien. Tom. cit. 
p. 629, pi. xxxi. 
38. Gabriel, B. Zur Classification der Gregarinen. Zool. Anz. iii. 
[1880] p. 569. Abstract in J. R. Micr. Soc. (2) i. p. 67. 
39. Grassi, B. Intorno a special! corpuscoli (Psorospermici) del’ Uomo. 
Rend. 1st. Lomb. (2) xii. p. 632, figs. 1-11. 
Oviform psorospermim described and figured from the fasces of a male 
child of three months. In the earliest stages the limiting membrane has 
only a single contour ; in some of the cells several nuclei occur, in some 
they are replaced by fine linear bodies. 
40. Schneider, A. Sur les Psorospermies oviformes ou Coccidies, 
esp^ces nouvelles ou pen connues. Arch. Z. expdr. ix. p. 387, pi. xxii. 
Classipication. 
Gabriel (38) finds the septum of compound forms not to be accom- 
panied by any other remarkable peculiarities of organization. The dis- 
