. Bulletin of the British Museum (Natural History), Geology. 26 P. D. TAYLOR. Fig. 50 Elea hexagona d'Orbigny, 1853, ZMC Levinsen Collection M39, Santonian, Vendome, France, x 28. slightly longitudinally elongate pseudopores; zooidal bound- aries marked by low, thread-like ridges. Apertures (Fig. 59) small, longitudinally elongate, a little less than 1-5 x longer than wide, attaining maximum width about mid-length, rounded distally; apertural shelf distinct, narrow; hinge line very slightly bowed, teeth not clearly apparent; apertural rim raised. A large and prominent tubercle (Fig. 61) occurs
. Bulletin of the British Museum (Natural History), Geology. 26 P. D. TAYLOR. Fig. 50 Elea hexagona d'Orbigny, 1853, ZMC Levinsen Collection M39, Santonian, Vendome, France, x 28. slightly longitudinally elongate pseudopores; zooidal bound- aries marked by low, thread-like ridges. Apertures (Fig. 59) small, longitudinally elongate, a little less than 1-5 x longer than wide, attaining maximum width about mid-length, rounded distally; apertural shelf distinct, narrow; hinge line very slightly bowed, teeth not clearly apparent; apertural rim raised. A large and prominent tubercle (Fig. 61) occurs distally of the autozooidal aperture and is shaped like a compressed barkhan dune facing towards the aperture. Oper- cula (Fig. 58) fairly commonly found in-situ, surface convex, bearing about 10 radial ridges peripheral to a central flatter area; pseudopores not seen. Intramural eleozooids often present; apertures variably D-shaped to inverted T-shaped, located within the distal half of the aperture of the host autozooid. Intramural autozooids possibly present but infre- quent. Eleozooids (Figs 57, 60, 62-64) common, scattered or in small groups, with pseudoporous frontal walls having approximately the same area as, though often narrower than, those of autozooids. Apertures highly variable in length, ranging from about 2 to 5 x longer than wide, tapering to become very narrow at the rounded distal extremity; aper- tural shelf wide, beginning just distally of the hinge-line; distal tubercle absent. Opercula (Fig. 63) occasionally found in-situ. Intramural eleozooids (Fig. 64) often present. Gonozooids known from only one specimen (VH 10460), which has an intact and an abraded example; in the former (Fig. 65) an initially narrow, tubular distal frontal wall becomes densely pseudoporous before dilating into an elon- gate ovoid shape. Ooeciopore circular or slightly longitudi- nally elongate, about the same length as an autozooidal aperture. Atrial ring not apparent in the abrade
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