4 (J) Test has no aperture 5 



4 (i) Test has one or more apertures 6 



X75 



5 (4) Wall is thick, rigid, and fine grained; shape is hemispherical. Diameter 0.30-0.50 mm. a. Oblique view; 



b, basal view of detached specimen Hemisphaerammina bradyi 



X10 



r 



5 (4) Wall is th^n, flexible, coarse grained; shape is variable, low, 

 spreading. A real extent is variable, usually >1 mm aaoss; wall 

 thickness about 0.02 mm. a. Top view; b, side view Iridia diaphana 



z\ 



6 {4) Test is a slender tube 

 6 (4) Test is hemispherical 



7 (6) Test consists of a slender winding tube of uniform width, normally encrusted upon 

 shell fragments, pebbles, or other Foraminifera. Diameter of tube about 0.10 mm. 

 (Specimen attached to a fragment of Rhabdammina.) Tolypammina vagans 



XIO 



