ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
625 
Saccamoeba punctata g. et sp. n., whose pseudopodia, though more distinct 
than in the preceding genus, are mere blunt protrusions ; S. verrucosa 
= Amoeba verrucosa Ehrbg. ; S. lucens sp. n., containing crystals ; 
S. magna sp. n., 70 /x in length by 40 /x in breadth ; S. villosa = 
Amoeba villosa Wallich ; S. cubica sp. n., of cubical shape and with 
radial arrangement of granules ; S. morula sp. n., inclining towards the 
genus Amoeba; S. renacuago sp. n., from the rectum of the larvae of 
Bufo , with pseudopodia approaching the finger-shaped protrusions of 
Amoeba ; several doubtful species of Saccamoeba ; Pelomyxa villosa 
Leidy ; Amoeba proteus Leidy ; A. Hercules sp. n., w r ith a cuticular 
envelope and a median diameter sometimes measuring 100 /x ; A. pellu- 
cida sp. n., sometimes as large as the preceding species, but very 
clear in its contents, and with a very marked differentiation of the 
plasma into two regions ; Dactylospliserium radiosum Ehrbg. ; Tricholimax 
hylse g. et sp. n., with one very short flagellum and a marked streaming 
of the plasma, occurring in the terminal part of the intestine of the 
larvae of Hyla ; Micromastix Januarii g. et sp. n., with a flagellum shorter 
than the diameter of the cell ; Mastigella polymastix g. et sp. n., occupy- 
ing a position near Mastig amoeba ; Limulina unica g. et sp. n., with a 
posterior flagellum ; Mastigina chlamys g. et sp. n., with the flagellum 
situated over the nucleus ; M. paramylon sp. n. ; and Mastigamoeba 
Schulzei sp. n. 
Amoebae.* — Prof. R. Greef continues j his account of his studies of 
amoeboid forms. From Ostend he obtained five species of marine 
Amoebae. A very detailed account is given of A. Jluida Gruber, which 
was found in astounding numbers, and lived over the winter. The 
author states that he has now been able to find in all Amoebae examined 
by him, the thick outer tegument which he first observed in terrestrial 
forms. In A. Jluida this tegument is constantly broken through at one 
spot, and the opening leads directly iuto the interior of the body ; 
through this opening and it only the protoplasm sends out its pseudo- 
podia to the exterior. This species is, therefore, one of the monothala- 
mous Rhizopoda. From the observations which Prof. Greef was able to 
make he is led to the conclusion that the body of A. Jluida is surrounded 
by a thin, very flexible, resistant, and perhaps chitinous integument. 
The consistency of the protoplasm of this creature is so slight that the 
granules suspended in it exhibit a lively molecular movement, such as 
the author described some years since in Pelomyxa palustris. Some 
account is also given of Amoeba crystalligera , and the whole may be 
specially recommended to those microscopists who devote themselves 
particularly to the Rhizopoda. 
Balantidium Coli4 — Herr J. Mitter has examined a man who for 
several years was engaged in the care of pigs, and was infested by a 
number of these intestinal parasites. He shows that the pig is to be 
regarded as the intermediate host, and that the parasite has considerable 
pathological significance. 
* Biol. Centralbl., xii. (1892) pp. 373-84. f See ante , p. 51. 
X ‘ Beitrag zur Kenntniss des Balantidium Coli im menschlichen Darmkanale,* 
Kiel, 1891. See Centralbl. f. Bakteriol. u. Parasitenk., xii. (1892) p. 111. 
1892. 2 u 
