PHYLUM PROTOZOA 



4.Frondicu!aria G.CIobigerina 



Q.PIanorbulina 



ILNummulires 



FIG. 5. Shells of Foraminifera. In j, 4, and j, a shows the surface view, and b a 

 section ; Sa is a diagram of a coiled cell without supplemental skeleton ; 8b of 

 a similar form with supplemental skeleton (s. sk.~) ; and 10 of a form with 

 overlapping whorls ; in ua half the shell is shown in horizontal section ; b is 

 a vertical section ; a. aperture of shell ; i 15, successive chambers, i being 

 always the oldest or initial chamber. (After Carpenter, Brady, and Butschli.) 



