Plate 39. GLOBOROTALIA, TRUNCOROTALOIDES 



(Figures 3a-c, X 144; all others X 73) 



Page 

 Figures la-^. Globorotalia centralis Cushman and 169 

 Bermudez 



la, Spiral view of large hypotype (USNM 

 P5748a). lb, Umbilical view. Ic, Side view. 

 2a, Spiral view of high spired hypotype (USNM 

 P5748b). 2b, Side view. 3a, Spiral view of small 

 hypotype (USNM P5 748c) . 3b, Umbilical view. 

 3c, Side view. All from the Porticulasphaera 

 mexicana zone, Navet formation, Trinidad. 

 4, Side view of typical hypotype (USNM PS 749). 

 From the Globorotalia cocoaensis zone, San Fer- 

 nando formation, Trinidad. 

 Figures Sa-7b. Globorotalia cocoaensis Cushman 169 

 5a, Spiral view of the distinctly umbilico-con- 

 vex hypotype (USNM P5750a). 5b, Side view. 

 6a, Spiral view of hypotype (USNM PS750b). 

 6b, Umbilical view. 6c, Side view. 7a, Spiral 

 view of hypotype (USNM PS750c). 7b, Side 

 view. All from the Globorotalia cocoaensis zone, 

 San Fernando formation, Trinidad. 

 Figures 8-1 2c. Truncorotaloides rohri Bronnimann 170 

 and Bermudez 



8, Spiral view of juvenile hypotype which has 

 not yet developed sutural supplementary aper- 

 276 



Page 



tures(USNMP5751a). 9, Spiral view of slightly 

 larger hypotype (USNM PS7Slb), showing 

 sutural supplementary apertures. 10a, Spiral 

 view of hypotype (USNM PS7Slc) with sutural 

 supplementary aperture on rudimentary final 

 chamber. 10b, Umbilical view. 11, Spiral view 

 of hypotype (USNM PS 75 Id) showing several 

 sutural supplementary apertures in the last two 

 chambers. 12a, Spiral view of characteristic 

 hypotype (USNM PS7Sle). 12b, Umbilical view. 

 12c, Side view. All from the Porticulasphaera 

 mexicana zone, Navet formation, Trinidad. 

 Figures 13-16b. Truncorotaloides topilensis (Cush- 170 

 man) 



13, Spiral view of small hypotype which has 

 not developed sutural supplementary apertures 

 (USNM PS7S2a). 14, Spiral view of small hypo- 

 type showing two small sutural supplementary 

 apertures (USNM PS7S2b). 15, Spiral view of 

 large hypotype (USNM PS7S2c). 16a, Spiral 

 view of very angular, spinose hypotype (USNM 

 PS7S2d). 16b, Umbilical view. 16c, Side view. 

 All from the Porticulasphatra -mexicana zone, 

 Navet formation, Trinidad. 



