. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA Ammonia batavus (Hofker) (PI. 18, figs 5, 6, 14, 16; Text-fig. 39, nos 1-4) Streblus batavus Hofker, 1951 : 498, 340, 341; Haake, 1962 : 52, pi. 6, figs 6-12. Ammonia batavus (Hofker) Feyling-Hanssen, 1964 : 349, pi. 21, figs 4-13. Rotalina beccarii Williamson, 1858 : 48, pi. 14, figs 90-92 (not Nautilus beccarii Linne). Rotalia beccarii part Parker, 1952b : 457, pi. 5, figs 5a, b; ? Cushman, 1949 : 47, pi. 9, fig. 4 (not Linne). ? Streblus beccarii Todd & Low, 1961 : 18, pi. 2, figs
. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA Ammonia batavus (Hofker) (PI. 18, figs 5, 6, 14, 16; Text-fig. 39, nos 1-4) Streblus batavus Hofker, 1951 : 498, 340, 341; Haake, 1962 : 52, pi. 6, figs 6-12. Ammonia batavus (Hofker) Feyling-Hanssen, 1964 : 349, pi. 21, figs 4-13. Rotalina beccarii Williamson, 1858 : 48, pi. 14, figs 90-92 (not Nautilus beccarii Linne). Rotalia beccarii part Parker, 1952b : 457, pi. 5, figs 5a, b; ? Cushman, 1949 : 47, pi. 9, fig. 4 (not Linne). ? Streblus beccarii Todd & Low, 1961 : 18, pi. 2, figs 18, 19. Ammonia beccarii (Linne) var. batavus (Hofker) Murray, 1965a : 502 (list), pi. 1, figs 1, 1; 2, 2 (stereopairs). Diagnosis. A biconvex Ammonia generally flattened on the dorsal side with subangular to subround periphery, reaching 0-40 mm in average diameter in 2-3 whorls, with eight or nine chambers visible on the ventral side. A large plug (often divided) fills the ventral umbilicus and smaller granules line the deeply fissured septal sutures. The spiral suture is often raised on the dorsal side and divided in the last whorl with small openings at the junctions with the sutures. Description. (Text-fig. nos 1-3.) Test with broken final chamber; biconvex, about twice as wide as high, with subangular periphery, ventral side involute and more strongly raised than the evolute, rather flattened dorsal side, outline weakly lobate; chambers 26 (including proloculus) slowly increasing in size as added and arranged in a very low trochoid spiral, 6:7:9: 3—, in each whorl following the proloculus, becoming slightly longer than high in the third whorl as seen in dorsal view; dorsal side extremely smooth and sutures flush; nine chambers visible on the ventral side with thickened, angular umbilical ends, sutures straight, deeply incised towards the umbilicus and lined by small, clear calcite bosses; umbilicus large and filled by a single prominent plug; last chamber broken so the
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