418 University of Kansas Geological Survey. 



under a cover glass with balsam. Specimens thus prepared 

 show clearly, not only the form of the imprisoned shells, but also 

 their arrangement and the number in a given area. Surface 

 markings are as plainly apparent as in the isolated tests, for at 

 one or more places the abrasion has occurred in such a way as 

 to exhibit the shell free from the matrix. Above all, every- 

 thing existing in the space occupied by the section is present 

 and visible, and is not dependent upon chance for discovery. 



FORAMINIFERA. 



Subkingdom PROTOZOA. 



Class Rhizopoda. 



Order Foraminifera . 



Suborder A: Chitinosa Schwager. 



Test chitinous, imperforate, occasionally incrusted with agglutinated 

 particles ; pseudopodial opening at one or both ends. 

 Family. — Gromiido3. Not found fossilized. 



Suborder B : Agglutinantia Schwager. 



Test of agglutinated silicious particles, held together by an argilla- 

 ceous or silicious cement. 



Family 1. — Astrorhizidaz Brady. Paleozoic to Recent. 



* Family 2. — Lituolidce Brady. Carboniferous to Recent. 



* Family 3. — rbitolinidai Zittel. Through Cretaceous. 



Suborder C : Porcellanea Schwager. 



Test calcareous, porcellaneous, imperforate. 



Family 1. — Nubecularida? Brady. Triassic to Recent. 

 Family 2. — Peneroplidce Schwager. Triassic to Recent. 



* Family 3. — Miliolidaz Carpenter. Triassic to Recent. 



Suborder D : Vitro-calcarea Schwager. 



Test calcareous, vitreous, perforate, sometimes silicious, finely per- 

 forate. 



* Family ]. — Lagenidaz Carpenter. Silurian to Recent. 



* Family 2. — Textularidoz Schultze. Carboniferous to Recent. 



* Family 3. — Globigerinida? Carpenter. Triassic to Recent. 



* Family 4. — Rotalido3 Carpenter. Silurian to Recent. 

 Family 5. — Fusidinidce Holler. Carboniferous. 



Family 6. — Numulinidaz Moller. Carboniferous to Recent. 



The Foraminifera belong to the subkingdom Protozoa in the 

 class Rhizopoda. They form an order characterized by their 

 immense numbers, great variety of forms, and long geological 



