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Show 1894.] FORAMINIFERA FROM TRINIDAD. 651 and E. ellipsoides) may turn out to be only extreme variations of one species. E. subnodosa and E. exponens are found in the Tertiary Microzoic rocks of Naparima in Trinidad; and, as already stated, E. exponens is found in the oceanic deposits of Barbados. Brady truly remarks that it is more than probable that specimens belonging to the group may have been mistaken for forms of Lagena, Glandulina, and Nodosaria. I add that Ellipsoidina may be found to bear a somewhat similar relation to Pleurostomella that Glandulina does to Nodosaria. 4. FRONDICULARIA FLABELLIFORMIS, n. sp. (Plate XLI. figs. 5,6.) Test fan-shaped, widening rather rapidly, sometimes with angular projecting ends to the segments. The aperture is a narrow (linear) fissure between thickened everted and plaited or corrugated lips. The form delineated in fig. 6 is stouter and of more even outline, the ends of the segments not projecting. Some examples (not figured) have the ends of the segments very decidedly projecting. This is wonderfully like Pavonina flabelliformis, which occurs with it in the Microzoic rocks of Naparima, Trinidad; so much so that at first I confounded the two, and sent specimens of the Frondicularia to the British Museum (Natural History) under the name of the Pavonina. But the aperture distinguishes it easily ; and when once recognized there is no likelihood of one being mistaken for tbe other. 5. GAUDRYINA PARIANA, n. sp. (Plate XLI. figs. 21, 22.) A Gaudryina of somewhat angular sectional contour. The triserial initial portion is triangular, the test afterwards taking on the biserial Textularian form. The test is roughened by minute sand-grains. This species is very much smaller than the dimensions usually attained by other members of the genus, e. g. G.pupoides; and the other Foraminifera found in the same deposits are with certain exceptions also of small size. It is from the Ditrupa-hed of Pointapier, Trinidad. 6. G A U D R Y I N A LOBATA, n. sp. (Plate X L I . fig. 20.) Test elongate, somewhat compressed, tapering, subarcuate, the chambers projecting in the form of lobulated segments. Aperture large, surrounded by a raised lip. The nearest relation of this species is probably G. baccata, Schwager; but its segments are prominent and distinct. It also vecalls^Boiivina lobata, Brady. It occurs in the Microzoic rocks of Naparima, Trinidad. 7. G O N A T O S P H ^ E R A PROLATA, nov. gen. et sp. (Plate XLI. figs.'14-19.) Test a many-chambered someAvhat prolate sphaeroid, the initial end generally of rather smaller diameter than the other. Chambers |