. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA 215 bers. A similar development occurs in Elphidium selseyense (PL 22, fig. 3) and is probably connected with a particular phase of ontogeny. It is reminiscent of the bulla in certain Globigerinidae. Distribution. This variety was described from Pistilfjorour, Iceland and has also been recorded from off the seaboard of N. America, Portsmouth, New Hampshire (Parkei, 1952a). Nonionella (? Nonionellina) species A (PI. 22, figs 17, 18; PI. 23, fig. 3; Text-fig. 46, nos 1-4) Diagnosis. A
. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA 215 bers. A similar development occurs in Elphidium selseyense (PL 22, fig. 3) and is probably connected with a particular phase of ontogeny. It is reminiscent of the bulla in certain Globigerinidae. Distribution. This variety was described from Pistilfjorour, Iceland and has also been recorded from off the seaboard of N. America, Portsmouth, New Hampshire (Parkei, 1952a). Nonionella (? Nonionellina) species A (PI. 22, figs 17, 18; PI. 23, fig. 3; Text-fig. 46, nos 1-4) Diagnosis. A compressed species of Nonionella with chambers becoming more than three times as high as long; test apparently tending to become almost planispiral and aequilateral in the last part; ventral umbilicus tuberculate. Description. (PI. 22, figs 17, 18; PI. 23, fig. 3.) Test compressed, ear-shaped with entire to slightly lobate, subround periphery; chambers arranged in a low, dextral trochospire, ten visible at the periphery with flattened sides, gradually increasing in size as added, last one more than three times as high as wide and projecting into the ventral umbilicus; sutures thickened and incised, swept back; wall thin, apparently granular, finely and densely perforate; aperture a series of small irregular openings at the ventral, basal suture of the last chamber surrounded by tubercles which fill the umbilicus and line the sutures. Dimensions. Maximum diameter approx. 0-50 mm, width 0-35 mm, thickness 0-15 mm. Material. Four Fig. 46, 1-4. Nonionella species A. 1-3, specimen showing almost equal involution 011 both sides; 1, view of ventral side; 2, edge; 3, dorsal side; 4, additional specimen, side view. [. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). Londo
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