REPORT ON THE EORAMINIFERA. 
601 
Globigerina dutertrei, d’Orbigny (PL LXXXI. fig. 1 , a-c). 
Glofo'gerina dutertrei , d’Orbigny, 1839, Foram. Cuba, p. 95, pi. iv. figs. 19-21. 
„ „ Brady, 1879, Quart. Journ. Micr. Sci., vol. xix., N. S., p. 72. 
Test Rotaliform, suborbicular, both faces convex, margin thick and rounded ; composed 
of about three convolutions, the last of which consists of five segments ; segments gradu- 
ally increasing in size from the commencement, somewhat inflated, especially the later 
ones; aperture a single, arched orifice at the inferior umbilical margin of the final segment. 
Diameter, ^th inch (0‘5 mm.) or less. 
Globigerina dutertrei is a starved variety, which to some extent takes the place of 
the typical Globigerina bidloides in the antarctic seas, just as Globigerina pachy derma 
represents the type in arctic latitudes. It has a small, compact, rounded shell, in many 
respects similar to the latter variety, but it is composed of a larger number of chambers, 
the walls are comparatively thin, and the segmentation more distinct externally. In 
general conformation it resembles Globigerina dubia, but it has no umbilical vestibule, 
and the test is of comparatively poor dimensions. 
The most characteristic specimens of Globigerina dutertrei furnished by the Challenger 
material are from the Antarctic Ice-barrier, Stations 153 and 155, where they occur both 
in the surface-water and in the bottom-ooze. It is not, however, entirely confined to 
high latitudes, but has been found at one or two Stations in the South Pacific, and by 
d’Orbigny amongst the West Indies. 
Globigerina injlata, d’Orbigny (PI. LXXIX. figs. 8-10). 
Globigerina injlata, d’Orbigny, 1839, Eoram. Canaries, p. 134, pi. ii. figs. 7-9. 
,, rubra (pars), Bailey, 1851, Smithsonian Contrib., vol. ii. art. 3, p. 11, figs. 
20 - 22 . 
Botalina ardasii, Seguenza, 1862, Atti dell’ Accad. Gioenia, ser. 2, vol. xviii. p. 101, pi. i. figs. 5, 
5 a, b. 
Globigerina bidloides, var. injlata, Parker and Jones, 1865, Phil. Trans., vol. civ. p. 367, pi. xvi. 
figs. 16, 17. 
„ injlata, Owen, 1867, Journ. Linn. Soc. Lond., vol. ix., Zool., p. 148, pi. v. figs. 13- 
15. 
„ „ Brady, 1879, Quart. Journ. Micr. Sci., vol. xix., N. S., p. 72. 
Test Rotaliform, superior face almost flat, inferior highly convex, periphery obtuse or 
rounded ; composed of three convolutions, the last of which consists normally of four seg- 
ments ; sutures somewhat depressed externally ; aperture a large, arched, gaping orifice 
on the outer or septal face of the terminal segment. Diameter, gpth inch (0'5 mm.). 
Globigerina injlata is a well-differentiated Rotalia- like variety, isomorphous with 
Rotalia soldanii and Pulvinulina crassa, from the latter of which it is sometimes distin- 
