PBOTOZOA — FOKAMINIFEEA. 
25 
fuses with it, and round the united pair grows a shell which 
proves to be the central chamber of a small-sphered form. 
The two forms of shell are to be seen in the following 
two pair’s of so-called species ; in each case the name which 
has to be adopted for the whole species, and under which 
it is exhibited, is the one printed in italics. 
Laege CiECLE, Small Circle, | Formation and 
Small Sphere. Large Sphere. Country. 
Nummulites convplcma- N. Tchihatcheffi, d’Ar- : Eocene and (?) Mio- 
tus, Lamarck. chiac. cene, Prance, Ba- 
varia, Hungary, 
Egj'pt, India. 
N. perforatus (de N. Lucasanus (De- | Eocene, India. 
Montfort). france). I 
N. gizehensis (ForskSJ). N. curvispirus (Savi and j Eocene, Egj’pt. 
Heneghini). 
N. laevigatas, La- N. Lamarcki, d’Archiac | Eocene, France, Eng- 
marck. and Hairae. land (Bracklesham). 
Assilina cxponcns Assilina mammillata Eocene, India, Ba- 
(Sowerby). (d’Archiac). varia. 
A “ Catalogue of the Fossil Foraminifera in the British 
Museum,” by T. B. Jones, was published by the Trustees in 
1882. See further Carpenter, Parker, and Jones “ Introduc- 
tion to the study of the Foraminifera,” London, Bay Society, 
1862; Chapman “The Foi’aminifera,” London, 1902; Lister, 
Section on Foraminifera in Lankester’s “ Treatise on Zoology,” 
London, 1903, and Address to Section D, British Associa- 
tion, 1906. 
Eozoon. 
This green seri)entinous rock, in wavy layers, which was 
formerly thouglit, chiefly by W. B. Carpenter and J. W. 
Dawson, to have been built up by a colonial Foramiriifer, 
called by them Eozoon (the dawn animal), is found in some 
of the very oldest rocks in Canada and Bohemia. A similar 
mineral structure, however, also occurs in much later rocks, 
including some of undoubted igneous origin. The organic 
nature of Eozoon is therefore upheld no longer, but the 
hypothesis had its uses in the impetus which it gave to the 
microscopic and chemical study of rocks. 
Gallery X. 
Table-case 
16. 
Wall-case' 
9 b, corner. 
