Group of the “* Physemaria.”’ 7 
has in the end forced upon me not only the unavoidable neces- 
sity of coining for this particular group a special classificatory 
title ; it has at the same time been suggestive of an entirely 
new and simple scheme of reclassification, or redivision into 
primary sections, of the entire Protozoic subkingdom. This 
latter object I have proposed to attain by taking as a basis 
for diagnosis the nature and extent of the oral or inceptive 
area. ‘[hus, for instance, among an exceedingly extensive 
group of the Protozoa, embracing practically all the represen- 
tatives of the Rhizopoda and certain Flagellata, it will be found 
that there is no especial mouth-aperture, food-particles being 
engulfed indiscriminately by the soft, yielding sarcode at any 
point on the surface of the periphery. ‘These organisms are, 
in fact, in all parts and everywhere mouth, and represent the 
simplest or most degraded types of the whole subkingdom. 
In reference to this dispersed character of the inceptive 
surface I have proposed for this section the title of the 
‘“* HoLtosroMaTA*”. Advancing a little further we find a 
group in which, although the oral or inceptive areas have 
become distinct and specialized, they are at the same time 
multifarious and distributed over a considerable extent, if not 
over the whole, of the surface of the body. This elass or 
section is represented by the Acinetina or Suctoria, a group 
in which the modification into tubular sucking-mouths of 
the pseudopodia of the preceding Holostomatous type is at once 
apparent. Tor these many-mouthed forms I have proposed 
the title of the PotystomaTa. With the next step forward we 
are brought face to face with that assemblage of collar-bearing 
flagellate forms that constitute the chief subject matter of 
this communication. Here, as already shown, there is a con- 
siderable advance upon the two preceding types; for the in- 
ceptive area, although not yet attaining to the importance of a 
distinct and definite mouth, is no longer scattered over the 
general surface of the body, but is concentrated and confined 
to the anterior extremity. In reference to the discoidal form 
of this anterior inceptive area, bounded, as already shown, 
by the base of the funnel-shaped collar, I have proposed the 
title of the Discosromara. ‘The fourth and most specialized 
group of the Protozoa includes the typical Ciliate and Flagel- 
late Stomatode Infusoria, which may be collectively distin- 
guished by the title of the MonosromaTa or EusroMata. 
A brief space may now be devoted to an examination of 
the claim of the members of the sponge tribe for admission 
into the ranks of one or other of the four Protozoic classes or 
subdivisions above enumerated. As mentioned ina preceding 
* [Already used in Mollusca, and hardly bearing the signification here 
given to it.—HDs. | 
