Plate 49. HORNERSTOWN CHILOGUEMBELINA, GLOBIGERINA, AND 



GLOBOROTALIA 



(All figures X 145) 



Page 



Figure 1. Chiloguemhelina crinita (Glaessner) 178 



1, Side view of hypotype (USNM PS8S3), 

 showing aperture directed toward broad side of 

 test, and the finely spinose wall. 

 Figure 2a-c. GloMgerina maequispira Subbotina 181 

 2a, Spiral view of hypotype (USNM P5732). 

 2b, Umbilical view, showing small apertural lip. 

 2c, Edge view, showing spinose wall. 

 Figure 3a-c. Globigerina spiralis Bolli 182 



3a, Spiral view of hypotype (USNM PS838), 

 showing low chambers, and slight curvature of 

 sutures. 3b, Umbilical view, showing successive 

 umbilical apertures and prominent spines in aper- 

 tural region. 3c, Edge view, showing relatively 

 high spired test. 

 Figures 4-Sc. Globigetina chascanona Loeblich and 180 

 Tappan, new species 



4, Paratype (USNM PS843). 5, Holotype 

 (USNM P5842). 4a, 5a, Spiral views, showing 

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 inflated chambers, numerous whorls and hirsute 

 surface. 4b, 5b, Umbilical views, showing small 

 umbilical aperture. 4c, 5c, Edge views, showing 

 globular chambers and variation in height of 

 spire. 



Figures 6a-c. Glohorotalia pseudomenardii Bolli 193 



6a, Spiral view of hypotype (USNM P5704), 

 showing strongly curved sutures. 6b, Umbilical 

 view, showing peripheral keel and low aperture. 

 6c, Edge view, showing subacute, keeled periph- 

 ery, and angular umbilical shoulder. 



Figures 7a-c. Glohorotalia elongata Glaessner 189 



7a, Spiral view of hypotype (USNM PS697), 

 showing gently curved sutures, and rapidly en- 

 larging chambers. 7b, Umbilical view, with 

 rounded chambers, small umbilicus and narrow 

 apertural lip. 7c, Edge view, showing rounded 

 periphery and arched aperture. 



