42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 'J'] 



Genus HASTIGERINA Wyville Thomson, 1876 



Plate 8, fig. 9 



Test composed of numerous chambers arranged in a phnospiral 

 manner, inflated ; surface with numerous spines, the edges parallel and 

 toothed ; aperture large, broad, oval, at the inner margin of the 

 chamber. 



Genus CANDEINA d'Orbigny, 1839 

 Plate 9, fig. I 



Test generally trochoid, usually with the spire somewhat com- 

 pressed and the later chambers often irregular ; chambers numerous, 

 rapidly increasing in size as added, inflated ; wall usually clear and 

 translucent, in old-age specimens occasionally thickened and opaque : 

 apertures numerous, elliptical in form, placed in a somewhat regular 

 manner along the sutural lines between the chambers. 



Genus SPHAEROIDINA d'Orbigny, 1826 ■ 



Plate 9, fig. 2 



Test composed of a few chambers arranged in an irregular spire, 

 the later chambers especially much inflated, increasing rapidly in 

 size and embracing, a few only visible from the exterior ; wall per- 

 forate ; aperture an arched opening at or near the inner margin of 

 the chamber, often with a calcareous, tooth-like process partially 

 closing the opening. 



Genus PULLENIA Parker and Jones, 1862 



Plate 9, fig. 3 



Test composed of several chambers arranged in a planospiral or 

 oblique nautiloid more or less involute spiral, chambers not greatly 

 inflated, only those of the last-formed volution visible ; wall smooth, 

 perforations small and indistinct ; aperture a curved opening at the 

 base of the inner face of the chamber. 



Genus HANTKENINA Cushman, 1924 



Test free, planospiral, consisting of about three coils, chambers 

 few, usually about five in the adult coil, laterally compressed, wall 

 finely or coarsely perforate, sutures distinct and depressed, each 

 chamber, at least in the adult, with a stout peripheral spine with a 

 hollow center, aperture tripartite, one arm running along either side 

 of the base of the chamber, the other extending peripherally in the 

 apertural face of the chamber. 



