PROTOZOA — FORAMINIFERA. 
19 
Many species marked by d’Orbigny as fossil are now known 
to live also in modern seas, and many recent ones have since 
been found fossil. In the following classification these 
models are referred to as “ 0 1, 2, 3, &c.” 
The adjoining series of models, prepared by Prof. A. E. 
Eeuss and Dr. Anton Fritsch of Prague in 1861, war 
intended to supplement the series by d’Orbigny. These are 
arranged in the order of the catalogue issued with them, the 
classification being that of Reuss. Since an account of it is 
given in the paper by Parker, Jones, and Brady, quoted 
above, we need say here only that Nos. 1-30 are Imperforata ; 
Nos. 31-100, Perforata; Nos. 1-18 have arenaceous shells, 
while all the rest are calcareous. These models are referred 
to as “ R 1, 2, 3, &c.” 
The classification followed in the arrangement of the 
actual specimens, whether British or foreign, is that used by 
Brady in his report on the Foraminifera collected by 
H.M.S. ‘ Challenger.’ According to this, the genera are 
arranged in ten families, nowadays often raised to the 
rank of Orders. These are: (1) Allogromiidae, horny- 
shelled and mostly freshwater ; none fossil. (2) Miliolidae 
(Fig. 3, a, h, c), comprise all porcellanous shells ; this division 
exhibits a great many plans of shell-building, including 
several that are also found among arenaceous and hyaline 
Foraminifera ; examples of nearly all these occur as fossils. 
(Models, 0 8, 18, 31-33, 90-97, 100, E 16-21, are Miliolinae; 
0 22, 81, R 26, 27, are Hauerininae ; 0 16, 20, 21, 24, 48, 
R 15, 22-25, 29, 30, are Peneroplidinae ; 0 50, Alveolininae). 
(3) Astrorhizidae, arenaceous and irregular, usually single- 
chambered and seldom truly sej)tate ; Saccammina is well 
known in Carboniferous Limestone, but there are few other 
fossils of this family. (4) Lituolidae (Fig. 3, d, e), 
arenaceous, truly se[)tate and more regular; the shell-form 
is diverse ; and among exhibited fossil examples of the 
various types are Lituola (R 1-4, 13), Trochammina, 
Nodosinella, Stacheia, and Endothyra. Except for a few 
Endothyrinae, all the preceding families have essentially 
imperforate shells; the remaining families are essentially 
Perforata. (5) Textulariidae, msually arenaceous, but the 
smaller species are hyaline ; shells usually composed of a 
double or triple series of alternating segments ; Te;didaria 
(Fig. 3, I, 0 7, 28, R 75) is a common fossil (O 2, 25, 
56-58, 66, R 5-7, 10-12, 14, 28, 76, belong to the same 
sub-family); Bulimina (Fig. 3, n, 0 9, 68, R 8, 9, 64, 85), 
Gallery X. 
Wall-case 
9b. 
