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HANDBOOK OF PROTOZOOLOGY 



Genus Polymorphina d'Orblgny 



Test not vitreous, aperture not radiating 



Test planispiral, occasionally trochoid, then usually with processes 

 along the suture lines, septa single, no canal system; fossil and 

 recent Family 26 Nonionidae 



Genus Elphidium Montfort (Fig. 77, b) 

 Test planispiral, at least in the young, generally lenticular, septa 



double, canal system in higher forms; fossil and recent 



Family 27 Camerinidae 



Genus Operculina d'Orbigny (Fig. 77, c) 

 Test at least in the microspheric form generally biserial, aperture 



usually large, without teeth; fossil and recent 



Family 28 Heterohelicidae 



Fig. 77 a. Lagena striata. X50 (After Rhumbler). 



b. Elphidium strigilata. X40 (After Kiihn). 



c. Operculina ammonoides, two views. X50 (After Kiihn). 



d. Pavonina flabelliformis. X30 (After Brady). 



e Hantkenina alahamensis. X40 (After Cushman). 



f. Bolivina punctata. X 100 (After Kiihn). 



g. Rotalia beccarii. X40 (After Kuhn). 



h. Asterigerina carinata. X30 (after d'Orbigny from Cushman). 



Genus Pavonina d'Orbigny (Fig. 77, d) 

 Test planispiral, bi- or tri-serial with elongate spines and lobed 



aperture; fossil and recent Family 29 Hantkeninidae 



