114 BRITISH FRESHWATER RHIZOPODA. 
In describing the life-history and affinities of this 
organism the author says :* ‘“ Archerina is clearly one of 
the non-nucleate Gymnomyxa (Homogenea or Monera), 
and is, in so far as regards the various forms which 
its protoplasm may assume, not far removed from 
Cienkowski’s Vampyrellu. It is, however, definitely 
characterized and distinguished by its nucleus-like 
chlorophyl-corpuscle. No other Protozoon is known 
the form of which is thus dominated by a chlorophyl-. 
corpuscle, nor is there any form with a chlorophyl- 
bearing nucleus which might be compared with it. In 
regard to nutrition it clearly gives evidence of both 
plant-like assimilation of carbon through the agency 
of its chlorophyl-corpuscles, and of the usual ingestive 
voracity of the naked Protozoa.” 
Elsewhere Prof. Lankester remarks: + “ Archerina 
exhibits an amoeba phase in which the protoplasm is 
thrown into long stiff filaments surrounding a spherical 
central mass, about one two-thousandth of an inch in 
diameter (actinophryd form). A large vacuole (non- 
contractile) is present, or two or three small ones. 
No nucleus can be detected by a careful use of 
reagents in this or other phases. The protoplasm 
has been seen to ingest solid food-particles (bacteria) 
and to assume a lobose form. The most striking 
feature of Archerina is the possession of chlorophyl 
corpuscles. In the actinophryd form two oval green- 
coloured bodies are seen. As the protoplasm increases 
by nutrition, the chlorophyl corpuscles multiply by 
quaternary division and form groups of four or of 
four sets of four symmetrically arranged. The division 
of the chlorophyl corpuscles is not necessarily followed 
by thac of the protoplasm, and accordingly specimens 
are found with many chlorophyl corpuscles embedded 
in the large growth of protoplasm; the growth may 
increase to a considerable size, numbering some hun- 
dreds of chlorophyl corpuscles, and a proportionate 
development of protoplasm. Such a growth is nota 
*©Q. J. Mier, Sci.,’ lc. t+ ‘Encycl. Brit., lc. 
