. Bulletin of the British Museum (Natural History), Geology. I- H Fig. 57 Camera lucida drawing of apical disc plating in Zuffardia morgani (Cotteau & Gauthier), BMNH EE3791. Scale bar = 1 mm. trichtian. In the study area described here, the species is found only at Jebel Rawdah, at the following localities: Jebel Rawdah, section 1: bed 3 (5). Jebel Rawdah, section 2: bed 11 (47); bed 19 (5); bed 21 (5); bed 25 (1); loose, mostly derived from beds 2-11 (48). Jebel Rawdah, section 4: bed 2 (1). Diagnosis. A species of Zuffardia with a rather flat base and a periproct that becomes progressiv
. Bulletin of the British Museum (Natural History), Geology. I- H Fig. 57 Camera lucida drawing of apical disc plating in Zuffardia morgani (Cotteau & Gauthier), BMNH EE3791. Scale bar = 1 mm. trichtian. In the study area described here, the species is found only at Jebel Rawdah, at the following localities: Jebel Rawdah, section 1: bed 3 (5). Jebel Rawdah, section 2: bed 11 (47); bed 19 (5); bed 21 (5); bed 25 (1); loose, mostly derived from beds 2-11 (48). Jebel Rawdah, section 4: bed 2 (1). Diagnosis. A species of Zuffardia with a rather flat base and a periproct that becomes progressively more adoral as test size increases. Test shape highly variable, either inflated, keeled or depressed. Description. Tests ovoid in shape ranging from 10-8 to 33-7 mm in length. In plan view they are rounded anteriorly and slightly pointed posteriorly (PI. 21, fig. 9). The ambitus is rounded and in profile the base is flatfish and the upper surface ranges from low-domal or even flat, to conical and pointed at the apex (PI. 21, fig. 7; PI. 22, fig. 3). Test width is 83-97% of the length (mean = 90%, N = 25) and test height 55-91% of the length (mean = 71%, smaller individuals being proportionately taller, Fig. 57). The apical disc is monobasal and positioned 33-47% of the test length from the anterior border (mean = 40%, N = 24; Fig. 56). The madreporite is large and its pores extend to, and partially enclose, the four gonopores (Fig. 57). There appears to be a distinct sexual dimorphism in gonopore size, with large individuals having either large, closely spaced gonop- ores some 0-3-0-5 mm in diameter (female?) and others of comparable size having only small (0-1 mm diameter) gonop- ores (male?). Petals are lanceolate and converge distally but do not close (PI. 22, fig. 1; Fig. 58B). Petals II, III and IV are about 70-80% the length of the posterior petals. The two pores in each pair are approximately circular and connected by a groove. The three anterior petals extend approx
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