14 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



Subfamily 3. Bulimininae 



Test spiral, usually triserial, becoming involute and finally in 

 Entosolenia monothalamous; aperture, loop shaped, the larger end 

 away from the inner margin (or in Entosolenia rounded) usually with 

 a distinct tooth and internal tube connecting the chambers (or in 

 Entosolenia free at the inner end). 



Genus BULIMINA d'Orbigny, 1826 



Bull. 104, pt. 3, pp. 90-108. 



Genus ENTOSOLENIA Ehrenberg, 1848 



Bull. 104, pt. 4. (Here should be included some of the species 

 recorded under Lagena.) 



Subfamily 4. ViRGULiNiNAE 



Test usually showing traces of its spiral origin in the twisted young, 

 later biserial, and in the end forms uniserial. 



Genus VIRGULINA d'Orbigny, 1826 



Bull. 104, pt. 3, pp. 114-121. 



Genus BOLIVINA d'Orbigny, 1839 



Bull, 104, pt. 3, pp. 29-49 (except B. rhomhoidalis and B. quadri- 

 latera = Bolivinita) . 



Subfamily 5. Reussiinae 



Test distinctly triserial, at least in the young of most forms, in 

 specialized forms becoming uniserial; aperture in the simpler forms 

 and in the young, elongate, in the uniserial forms and some of the 

 triserial ones, cribrate. 



Genus REUSSIA Schwager, 1877 



Bull. 104, pt. 3, p. 60 ( Verneuilina spinulosa Reuss). 



Genus CHRYSALIDINELLA Schubert, 1907 



Bull. 104, pt. 3, p. 65 {Chrysalidina dimorpha H. B. Brady). 



Subfamily 6. UviGERlNlNAE 



Test generally triserial, at least in the earlier stages, later in some 

 forms uniserial or irregular; aperture typically terminal with a neck 

 and phialine lip, and in some genera a spiral tooth and an internal 

 twisted tube connecting the chambers. 



Genus UVIGERINA d'Orbigny, 1826 



Bull. 104, pt. 4, pp. 160-172 (except U. angulosa = Angulogerina). 



