NO. 4 FORAMINIFERA CUSHMAN 45 



usually visible from both sides, occasionally with limbate sutures ; wall 

 either smooth or with raised papillse, occasionally with limbate mar- 

 gins, coarsely punctate ; aperture usually a curved slit at the margin 

 of the inner end of the chamber, often with a definite lip. 



Genus SIPHONINA Reuss, 1849 

 Plate II, fig. 5 



Test free, composed of numerous chambers arranged in a some- 

 what irregular spiral, rounded or bicoiwex, perforate ; wall smooth 

 or ornamented ; aperture rounded, usually with a short neck and 

 phialine lip. 



Genus ANOMALINA d'Orbigny, 1826 



Plate II, fig. 4 



Test nautiloid, composed of numerous chambers, but slightly in- 

 volute ; the two faces usually much alike, biconvex or slightly unsym- 

 metrical ; aperture a narrow curved slit at the base of the final chamber. 



Genus CARPENTERIA Gray, 1858 

 Plate 9, fig. 6 



Test attached, early chambers rotaliform, later ones becoming 

 irregular and inflated, extending upward in an irregular column; 

 chambers few ; wall coarsely perforate ; aperture in adult specimens 

 usually with a tubular neck. 



Genus RUPERTIA Wallich, 1877 

 Plate II, figs. 2, 3 



Test attached, columnar ; early chambers coiled, later chambers 

 extending up into a coiled column ; wall coarsely punctate ; aperture 

 a narrow curved slit at the inner margin of the chamber. 



Genus PULVINULINA Parker and Jones, 1862 

 Plate 12, fig. I 



Test usually rotaliform, dorsal side usually convex, ventral side 

 usually flattened ; outline typically circular but in some species 

 elongate ; wall finely porous, variously ornamented by costse, bosses, 

 reticulations, or smooth ; aperture typically ventral, extending from 

 near the periphery to the umbilicus. 



