232 FORAMINIFERA 



EXPLANATION OF PLATE 33 



h etero h elicid ae 



Fig. 



1. Heterohelix americana (Ehrenberg). (After type figure). 



2. Pavonina flabelliformis d'Orbigny. X 50. (After Heron-Allen 



and Earland). 



3. Giimbelina decurrens (Chapman). (After Egger). 



4. Giimbelina globifera (Reuss). (After Egger). a, side view; b, 



apertural view. 

 5, 6. Pseudotextularia varians Rzehak. (After type figure). Fig. 6, 



Longitudinal section. 

 7. Pseudotextula7-ia fruticosa (Egger). (After type figure), a, front 



view; b, apertural view. 

 8, 9. Piano globulina acerimlinoides (Egger). (After type figure). Fig. 



9, By transmitted light. 



10. Vcntilabrella eggeri Cushman. (After Egger). a, side view; 



b, end view of early stage. 



11. Bolivinoides draco (Marsson). (After type figure), o, side view; 



b, apertural view. 

 12-14. Bolivinita quadnlatera (Schwager). Fig. 12, (After type figure). 



a, front view; b, side view. Figs. 13, 14, (After H. B. Brady). 



X 25. 

 15, 16. Bolivinella folium (Parker and Jones). Fig. 15, (After type fig- 

 ure). Fig. IG, (After IL B. Bi-ady). X 40. a, front view; b, 



apertural view. 

 17, 18. Spiroplectoides rosula (Ehrenberg). Fig. 17, (After type figure). 



Fig. 18, X 55. 

 19. Plectofrondicularia concava Liebus. (After type figui'e). 

 20, 21. Plectofrondicularia californica Cushman and Stewart. (After type 



figure). Fig. 20, Section of microspheric young. X 50. Fig. 



21, Exterior. X 35. 



22. Amphimorphina haneriana Neugeboren. (After type figure), a, 



side view; b, apertural view; c, section near base; d, section 

 near apex. 



23. Nodomorphina compressiusctila (Neugeboren). (After type 



figure). 



24. Eouvigerina americana Cushman. X 75. (After type figure). 



a, front view; b, side view; c, apertural view. 



25. Pseiidonvigerina cristata (Marsson). (After type figure). a, 



section. 

 2G. Psendonvigerina plummerae Cushman. X 65. (After type figure). 

 a, side view; 6, apertural view. 



27. Siphogenerinoides plummeri (Cushman). X 40. (After type 



figure), a, side view; b, apertural view. 



28. Nodogenerina bradyi Cushman. x 50. (After type figure). 



