Plate 52. MNCENTOWN GLOBIGERINA 



(All figures X US) 



Figures la-2c. Globigerina inafquispira Subbotiiia 181 

 la, 2a, Spiral view of hypotypes (USNM 

 PS117a,b), showing similarity to C triloculinoides 

 in test form, but with small pores instead of 

 prominent surface reticulation, lb, 2b, Umbili- 

 cal side, showing rapid increase in chamber size, 

 spiny surface of umbilical region, and broad 

 flange-like apertural lip. Ic, 2c, Edge views, 

 showing low spire and spiny surface. 



Figures 3-7. Globigerina triloculinoides Plummer 



Hypotypes (USNM F5123a-e). 4a, 6a, Spiral 

 views, showing characteristic test form and 

 prominent surface reticulation. 3, 4b, 5, 6b, 7, 

 Umbilical views, showing rapid increase in 

 chamber size, broad flange-like apertural lip and 

 coarsely reticulate surface. 4c, 6c, Edge views, 

 showing low spire. 



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