JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE XX, 
Illustrating Mr. W. Archer’s paper on Rhizopoda. 
Fig. 
1. — Pleurophrys ? spherica, Clap, et Lachm. ? In the centre of the body-mass, 
which is not in contact with the curious test, which is formed of indistin- 
guishable short bacillar and rounded particles agglutinated together, is 
seen a large orbicular “ nucleus. 5 ’ From the anterior extremity is given 
off a considerable tuft of slender, linear, slightly branched pseudopodia. 
2. — Pleurophrys ? amphitremoides (sp. nov.). The specimen figured is covered 
with numerous adherent navicular and other Diatomaceous frustules and 
arenaceous particles, and the body somewhat densely loaded with chloro- 
phyll granules, the anterior extremity giving off a rather dense tuft of 
slender branched pseudopodia. 
3. — Pleurophrys ? fulva (sp. nov.). Shows the buff or tawny colour of this 
minute form ; the test covered by angular, pellucid, quartzose particles ; 
the anterior extremity giving off a short, rather dense, and branched tuft 
or shrub-like cluster of pseudopodia. 
4. — Amphitrema Wrightianum (gen. et sp. nov.), from a specimen taken from 
“ Feather-bed Bog,” near Dublin ; shows the mass of the body coloured 
green by chlorophyll-granules. The drawing has been made from a se- 
lected example in which each of the very short necks of the test is more 
than ordinarily evident, owing to the paucity of the external adherent 
foreign particles at those points, which, when present, tend to obscure 
it. These particles are to be seen most crowded along the lateral mar- 
gins of the compressed elliptic test, leaving the central region more or 
less free from them, and thus allowing the sarcode-body within the more 
readily to be seen ; each extremity giving off a more or less dense tuft of 
branched pseudopodia, that from one of the extremities being, however, 
almost always more elongate and crowded than the other. 
5. — The same species, from a “ Glen-ma-lur” specimen, likewise selected the 
better to exhibit the two short necks appertaining to this form, owing to 
their exceptional freedom there from foreign particles. These latter, as 
in the preceding example, are here also seen more plentiful towards the 
lateral margin, but they are in this specimen somewhat less coarse ; the 
test itself, too, is slightly larger ; like the previous example, the tuft of 
pseudopodia from one extremity is larger, longer, and more crowded than 
from the other. 
6. — Diaphoropodon mobile (gen. et sp. nov.), showing the anterior, much 
branched, and tufted pseudopodia extended, but not as fully so as in 
some of the examples witnessed. To the right is the anterior marginal 
pulsating vacuole fully distended ; to the left, immersed in the body-sub- 
stance, is seen the large spherical “ nucleus,” the outer margin bor- 
dered by the fringe-like processes. 
7. — Gromia socialis (sp. nov.). Showing a group of three mutually united by 
anastomosis of their more or less reticulately branched pseudopodia, 
which here and there present variously shaped expansions, bearing different 
sized rather opaque granules, carried about in slow circulation. Immersed 
in the body portion of each is seen the whitish nucleus with its darker 
centra! nucleolus. 
8. — The same ; a single individual, showing a very long and branched pseudo- 
podium. 
9. — The same ; a single stemlike sarcode prolongation projected, branching at 
the top in a ramified dendroid manner; this being rather exceptional. 
10. — The same; an example showing a pseudopodium expanded into a clavate 
form, and enclosing some of the larger semi-opaque granules, like those in 
the intervening spaces of the conjoined pseudopodia of the three associated 
examples shown in Fig. 7. 
11. — The same; showing an example in which the body has undergone a trans- 
verse self-fission, and in each portion a nucleus with its nucleolus is 
present, the upper segment giving oft’ branched pseudopodia in the usual 
manner. 
12. — Diffluyia carinata (sp. nov.), x 200. 
All the figures X 400, except fig. 12, x 200. 
