Plate 56. AQUIA CHILOGUEMBFXINA, HETEROHELIX, AND GLOBIGERINA 



(All figures ^- 145) 



Figures la, b. Chiloguembelina crinita (Glaessner) 

 la, Side view of hypotype (USNM PS8S2), 

 showing flaring test and asymmetrical aperture. 

 lb, Edge view. 

 I-'iGURES 2a, b. Ileterohelix -wilcoxensis (Cushnuin 

 and Ponton) 



2a, Hypotype (USNM PS834) showing striate 

 surface, and globular chambers. 2b, Edge view, 

 showing low, symmetrical arched aperture. 

 Figures 3a, c. Globorotalia trihulosa Loeblich and 

 Tappan, new species 



3a, Spiral view of paratype (USNM PS851). 

 showing gradually enlarging chambers, with four 

 in final whorl, and spinose surface. 3b, Umbilical 

 view. 3c, Edge view. 



Page- 



178 



178 



19.=; 



Figures 4a-6c. (jlobigerina aquiensis Loeblich and 180 

 Tappan, new species 



4, 5, Paratypes (USNM P5840a, b). 6, Holotype 

 (USNM P5839). a. Spiral views, which show 

 gradually enlarging globular chambers. b, 

 Umbilical views, showing spiny wall, open 

 umbilicus and large umbilical aperture. C, Edge 

 views, showing variation in height of spire. 

 Figures 7a-c. Globigerina inaequispira Subbotina 181 

 7a, Spiral view of hypotype (USNM PS731). 

 showing resemblance to G. triloculinoides, but 

 with spiny rather than pitted surface. 7b, 

 Umbilical view. 7c, Edge view. 

 Figures 8a— c. Globigerina triloculinoides Plummer 183 

 8a, Spiral view of hypotype (USNM P5700). 

 8b, Umbilical view. 8c, Edge view. 



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