Plate S3. VINCENTOWN GLOBIGERINA AND GLOBOROTALIA 



(All figures: a, spiral view; b, umbilical view, C, edge view; all X 110) 



Figures 1, 2. Globigerina mckannai White 



Hypotypes (USNM P5119a,b). 1, Large 

 typical specimen with SVi chambers in final 

 whorl, open umbilicus and spiny surface, ex- 

 pecially in the umbilical region. 2, Small hypo- 

 type with tendency to develop an extraumbilical 

 aperture. 



FiGtTRE 3. Globigerina spiralis BoUi 



i Small hypotype (USNM PS121e), showing very 

 rare occurrence of an umbilical bulla. The 

 opening shown in edge view is not that beneath 

 the bulla, but an accidental break in the wall, the 

 true opening being on the opposite side of the 

 biilla, facing the umbilicus. 

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181 



182 



Globigerina cf. G. 



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 soldadoensis Bronni- 182 



ith rounded 



Figure 4, 

 mann 



Small specimen (USNM PS130) 

 chambers. 

 Figure S. Globorotalia pseudoscitula Glaessner 



Hypotype (USNM PS 139) showing typical 

 lenticular test, subacute periphery, gradually 

 enlarging chambers, nearly closed umbilicus and 

 extraumbilical-umbilical aperature. 

 Figures 6-8. Globorotalia convexa Subbotina 



Hypotypes (USNM P5129a-c), showing small 

 size, gradually enlarging chambers, broadly 

 rounded periphery, flattened spiral side and 

 nearly closed umbilicus. 



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