REPORT ON THE FORAMINIFERA. 
47 
III. Thalamophora. 
Supplementary Table I. 
1 . Imperforata — Thalamophora with either one- or many-chambered, chitinous or calcareous shells ; with 
one or two apertures, but possessing no pore-canals. 
(a) Amphistomata. 
(b) Monostomata. 
2. Perforata sen Foraminifera — Thalamophora, usually with many-chambered shells, which besides 
the general aperture possess numerous pore-canals. 
IY. Radiolaria. 
Supplementary Table II. 
Rhizopoda of rounded form, with one nucleus or more; with radiating, pointed, thread-like pseudopodia 
issuing from the surface. 
1. Heliozoa — Radiolaria without central capsule. 
2. Cytophora — -Radiolaria with central capsule. 
In the foregoing table the Order Thalamophora practically corresponds to the 
Foraminifera of the other authors ; whilst the latter term, possibly under a mistaken 
impression as to its original application, is confined to those forms which possess calcareous 
and perforate tests. Exception may also be taken to the subdivision of the Order into 
Monothalamia and Polytlialamia, a distinction of little or no zoological value; as well as 
to the employment of the terms Perforata and Imperforata, which embody characters 
not uniformly applicable to the groups for which they have been used. These however 
are minor considerations which do not materially affect the value of the scheme in its 
wider aspects. 
A passing notice may be accorded to the classification adopted by Professor Leicly in 
his recent elaborate monograph upon the Fresh-water Khizopods of North America. His 
treatment of the group, the general features of which are indicated below, commends 
itself by its extreme simplicity. 
Leidy, 1879. 
Class, Rhizopoda. 
Order I. Protoplasta. 
1. Lobosa. 
2. Filosa. 
II. Heliozoa. 
Order III. Radiolaria. 
IY. Foraminifera. 
V. Monera. 
It only remains to be added that Professor Huxley discards the use of the word 
Rhizopoda entirely, and dividing the Protozoa into a “ lower and a higher group/’ 
Monera and Endoplastica, 1 distributes the various structural types between the two. 
Under this arrangement the Foraminifera form a section of the Monera. 
1 Anatomy of the Invertebrated Animals, p. 76, London, 1877. It is explained in a footnote that this division is 
adopted as a matter of temporary convenience only. 
