. Bulletin of the British Museum (Natural History). L 0-5 mm J. Fig. 4 Hippoporidra edax (Busk). Coralline Crag, Suffolk. A, cortical zooid dfawn from the lectotype B1620; B, irregularly-shaped, frontally-budded autozooids and an adventitious avicularium drawn from specimen 23459b. Dimensions. Autozooid orifice length 0-10-0-11 mm, width 007-0-08 mm; cortical zooid orifice length 009-OlOmm, width 007mm; interzooidal avicularium rostrum length 0-15-0-17 mm, width 0-13-014 mm. Remarks. Michelin's (1847) type specimens of Cellepora parasitica are apparently lost (Roger & Buge 1948) and neithe

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. Bulletin of the British Museum (Natural History). L 0-5 mm J. Fig. 4 Hippoporidra edax (Busk). Coralline Crag, Suffolk. A, cortical zooid dfawn from the lectotype B1620; B, irregularly-shaped, frontally-budded autozooids and an adventitious avicularium drawn from specimen 23459b. Dimensions. Autozooid orifice length 0-10-0-11 mm, width 007-0-08 mm; cortical zooid orifice length 009-OlOmm, width 007mm; interzooidal avicularium rostrum length 0-15-0-17 mm, width 0-13-014 mm. Remarks. Michelin's (1847) type specimens of Cellepora parasitica are apparently lost (Roger & Buge 1948) and neither his figure nor his description are sufficient to permit positive identification of the species. The Cellepora parasitica Michelin of Busk (1859) may not be the same species as that described by Michelin. It has been redescribed by Lagaaij (1952) under the name Osthimosia parasitica (Busk, ? non Michelin). Specimens of the N. American species Cellepora minuta Canu & Bassler (1923) in the collections of the BM(NH) confirm its synonymy with H. edax. The closely similar Lepralia maculataJnc & Bassler (1904) may be also a junior synonym. Lepralia edax forma calcarea Smitt 1873, described from the Recent of Florida, has interzooidal avicularia identical with those of Coralline Crag H. edax. suggesting its synonymy. Hippoporidra lusitania sp. nov. 1861 Cellepora edax Busk; Busk : 154, figs 3, 3a. 1862 Cellepora edax Busk; Hincks : 304. 1880 Lepralia edax (Busk) Hincks : 311 (parlim); pi. 24, figs 7, 8 only [fig. 7a = H. edax]. 1929 Hippoporidra edax (Busk); Canu & Bassler : fig. 163 A, B. 1937 Lepralia e£^a.v(Busk); Moore : 202. 1964 Hippoporidra edax(Busk): Cook : 26 (parlim); pi. 3, figs 5, 6 only. 1979 Hippoporidra edax (Busk); Hayv/ard &. Ryland : 214, fig. 91A-E. Diagnosis. Autozooid orifice with poster slightly narrower than anter; interzooidal avicularium with a transversely elliptical rostrum and a simple pivotal bar. HoLOTYPE. BM(NH) Zoology Dept. no., 1