Helioferrusa hollandei nov. sp. Figures 9b, c, h, i Description . Shell thin disc-shaped consisting of 4 shells: a double medullary shell with an eccentric microsphere, a large main cortical shell, and a peripheral equatorial ring. Microsphere very small, eccentric in the outer medullary shell. Outer medullary shell prunoid or subspherical, with large circular or polygonal pores and included in the cavity of the cortical shell with whom it is connected to the two faces of the latter by a bunch of oblique radial beams. These beams do not cross this shell. Cortical shell large, disc-shaped or lenticular and a little thicker than the diameter of the outer medullary shell. It has numerous very small circular to oval pores of various sizes and irregularly or, partly, radially disposed. This shell is surrounded by a peripheral ring with similar pores but usually smaller. Inside this ring there are radial costae that divide its circumference in unequal segments. Periphery of ring with tiny thorns. Material . Four specimens, from the late middle Miocene sample PROA 96P. Holotype . The illustrated specimen, coll. MGL 103561. Dimensions . Diameter of microsphere 17-19 μm, of outer medullary shell 49-54 μm, of cortical shell 173-232 μm, of peripheral ring 232-330 μm. Etymology . The species is dedicated to André Hollande, co-author of the valuable monograph on living Radiolaria from the Gulf of Alger. Remarks . In this species I included two morphotypes: one found in sample PROA 96P (Fig. 9b), represented by 7 specimens, the other one in sample DSDP 21-205-7-1, 70-72 cm from South Fiji Basin, which is late Miocene (NN10 Zone) in age (Fig. 9c). These two morphotypes are practically contemporaneous but morphologically rather different. The morphotype from the sample PROA 96P has the cortical shell flat, very thin similar to that of Heliodiscus riedeli nov. sp., and the peripheral ring has thin intervening bars between pores. The morphotype from the sample DSDP 21-205-7-1, 70-72 has the lenticular cortical shell, with rather ...