28 - PROTOZOA—RHIZOPODA CLASS I 
Lingulina, VOrb. (Fig. 28, F). Test straight, compressed; segments 
attached in rectilinear series. General aperture terminal, slit-like. Triassic 
to Recent. 
Glandulina, Orb. (Fig. 29, 4). Test short, ovate; segments united in 
rectilinear series, half-embracing one another. General aperture round, ter- 
minal, usually tubu- 
lated. Triassic to 
Recent. 
Frondicularia, 
Defr. (Figs BaD): 
Test straight, ex- 
tremely compressed, 
and foliately — ex- 
panded. | Chambers 
greatly reflexed, 
laterally embracing 
la ee ms _ one another. General 
Polphorolina nfate, Williamson, Recent; German Ocean. 0, Dimormhina sy, SDOCbUre ft Gniieamiese 
Pliocene ; Sienna, Italy. D, Frondicularia Goldfussi, Reuss. Scaphiten-Planer ; minal. Triassic to 
Diilmen, Westphalia. 2, Uvigerina pygmaea, VOrb. Tegel (Miocene); Baden, 
near Vienna. Recent. 
Polymorphina, 
dOrb. (Fig. 29, B). Segments irregularly helicoid, or arranged in double 
series more or less enveloping each other and varying in shape. General 
aperture round, terminal. Triassic to Recent. 
Dimorphina, VOrb. (Fig. 29, C). Early chambers irregularly or triserially 
disposed, later ones following in a straight line. Cretaceous to Recent. 
Uvigerina, VOrb. (Fig. 29, #). Segments dissimilar, disposed in triple 
series, and spirally wound like a snail-shell. Eocene to Recent. 
A B (6; 

Fig. 29. 
Family 2. Textularidae. Schultze. 
Test in larger forms arenaceous, with calcareous basis perforated by coarse tubules ; 
in smaller forms vitreous, perforate ; segments reqularly or only in part arranged in 
two (rarely more than two) alternating series. 
Textularia, Defr. (Fig. 30, 4). Test usually elongated, straight, tapering, 
or turbinated. Chambers biserial, alternating, and communicating with each 
other by means of slit-like apertures. Carboniferous to Recent. Extremely 
abundant in the White Chalk. 
The genera Teatularia, s. str., Grammostomum (Fig. 30, D), and Bolivina (Fig. 
30, B) of the calcareous forms; and Plecanium (Fig. 30, C), Bigenerina, 
Gaudryina (Fig. 30, £), Clavulina (Fig. 30, F), and Verneuilina are founded upon 
various minor modifications. 
Bulimina, VOrb. (Fig. 31, A, B). Test caleareous, the alternating 
chambers arranged in an elongated spire. Triassic to Recent. 
Valvulina, V@Orb. (Fig. 31, #). Test arenaceous with calcareous basis. 
Chambers in triple series arranged in screw-like spiral. Carboniferous to 
Recent. 
Climacammina, Brady (Cribrostomum, Moller), (Fig. 31, Bb, C). Test 
arenaceous with calcareous basis. Chambers biserial, rectilinear. Oral aper- 
ture porous. Abundant in Carboniferous Limestone (ef. Bigenerina, d’Orb.) 
