CRETAQEOUS FORAMINIFERA. 41 
Globigerina.] { 
“Test spiral, subtrochoid; superior face convex, inferior more or less convex 
but with deeply sunken umbilicus, periphery rounded, lobulated ; adult specimens 
composed of about seven globose segments, of which four form the outer convolu- 
tion; the apertures of the individual chambers opening independently into the 
umbilical vestibule. Diameter sometimes ,,th inch (0.638 mm.) but oftener much 
less.’ Brapy Joc. cit. 
Locality. Meeker county, Minnesota; Saline county, Nebraska; South Chicago, Illinois. Common 
in Nebraska; not quite so common in Minnesota; rare in South Chicago. The most common of all our 
living forms, and may be found anywhere along our seacoast, also as a fossil in the ‘‘ Eolian sand” from 
the Smoky Hill river, near Lindsborg, Kansas. 
GLOBIGERINA CRETACEA d’Orbigny. 
PLATE D, FIGS. 18, 19. 
Globigerina cretacea d’ORBIGNY, 1840. Mem. Soc. Geol. France, vol. iv, p. 34, pl. iii, figs. 12-14. 
Globigerina faveolota (pars) EHRENBERG, 1854. Mikrogeologie, pl. xxiv, fig. 49. 
Globigerina libani EHRENBERG, Ibid., pl. xxv, fig. 30. 
Planulina pachyderma, Id., Ibid., pl. xxv, fig. 31. 
Rotalia pertusa, Id., Ibid., pl. xxiv, fig. 41. 
Rotalia aspera, Id., Ibid., pl. xxvii, figs. 57, 58; pl. xxviii, figs 42; pl. xxxi, fig. 44. 
Rotalia globulosa, Id., Ibid., pl. xxvii, fig. 60; pl. xxviii, figs. 40, 41; pl. xxxi, figs. 40, 41, 43. 
Rotalia densa, Id., Ubid., pl. xxvii, fig. 62. 
Rotalia quaterna, Id., Ibid., pl. xxvii, fig. 533; pl. xxviii, fig. 34. 
Rotalia rosa, Id., Ibid., pl. xxvii, fig. 54. 
Rotalia pachyomphala, Id., Ubid., pl. xxvii, fig. 55. 
Rotalia tracheotetras, 1d., Ibid., pl. xxvii, fig. 35. 
Rotalia perforata, Id., Ibid., pl. xxviii, fig. 36; pl. xxix, fig. 2. 
Rotalia protacmea, Id., Ibid.. pl. xxviii, flg. 37. 
Rotalia laxa, Id., Ibid., pl. xxviii, fig. 38 ; pl. xxix, fig. 1; pl. xxxi, fig. 42. 
Rotalia centralis, Id., Ibid., pl. xxviii, fig. 39. 
Globigerina cretacea BRADY, 1879. Quart. Journ. Micr. Soe., vol. xix, n. s., p. 285. 
Globigerina cretacea BRADY, 1884. Report on Foram. H. M.S. Challenger, Zool., vol. ix, p. 596, pl. 1xxxii, 
fossil specimens, fig. 11, a-c. 
Globigerina eretacea WODWARD and THOMAS, 1885. Thirteenth Annual Report, Geol. Nat. Hist. 
Surv. Minn., p. 171, pl. iii, figs. 14-16: iv, fig. 19. 
“Test rotaliform, much compressed; superior face flattened or only slightly 
convex, inferior side depressed towards the centre and excavated at the umbilicus, 
periphery obtuse and lobulated ; composed of about three tolerably distinet convolu- 
tions, the outermost consisting of from five to seven segments ; segments relatively 
small, subglobular ; apertures opening into an umbilical vestibule. Diameter=,th 
inch (0.5 mm.)” Bravpy Joe. cit. 
Locality. Meeker county, Minnesota; Saline county, Nebraska; South Chicago, Illinois, and Little 
Fork river, near Rainy lake, Minnesota. It is found very abundant in the Boulder clay of Minnesota, but 
the specimens are quite fragmentary, while those in the Nebraska and Illinois clays are more numerous 
and in a much better state of preservation. Dr. G. M. Dawson, in 1874, found it in the Cretaceous clays 
from Manitoba. 
