GENUS GLOBIGERINA d'ORBIGNY 



Globigerina aequilateralis Brady 



1 Thin section, x 174. (Slide 6) 



2 Entire specimen (bottom specimen), x 50. (After Brady, 



Chal. Rep't, v. 9, 1884, pi. 80, fig. 18) 



3 Surface specimen, x 50. (Ref. cit., pi. 80, fig. 20) 



Globigerina cretacea d'Orbigny 



4 Thin section, x 174. (Slide i) 



5 Entire specimens, a, superior aspect; h, inferior aspect. 



(After Woodward & Thomas, 13th Ann. Rep't Geol. Surv. 

 Minn., 1884 (1885), pi. D, figs. 18, 19) 



GENUS DISCORBINA PARKER & JONES 



Discorbina orbicularis (Terquem) 



6 Thin section, x 174. (Slide 6) 



7 Entire specimen, x 90. a, superior aspect ; h, peripheral aspect. 



(After Brady, Chal. Rep't, v. 9, 1884, pi. 88, figs. 4a, c) 



GENUS TRUNCATULINA d'ORBIGNY 



Truncatulina boueana d'Orbigny 



8 Thin section, x 174. (Slide i) 



9 Entire specimen, superior aspect, x 100. (After Brady, Pal. 



Soc, V. 30, 1876, pi. 6, fig. 11) 



Truncatulina lobatula (Walker & Jacob) 



10 Thin sections, x 174. a, cross section (slide 3); h, edgewise 



section (slide i); these sections were important in the 

 identification of the species 



11 Entire specimen, superior aspect, x 60. (After Brady, Chal. 



Rep't, V. 9, 1884, pi. 92, fig. 10) 



Truncatulina ungeriana d'Orbigny 



12 Thin section, x 174. (Slide 5 (X)) 



13 Entire specimen, superior aspect; length 0.42 mm, thickness 



0.22 mm. (After Vadasz, Triasforam. aus dem Bakony, 

 1 9 10, pi. 2, fig. 6a) 



