. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA 61 in size. P. appendiciilata (Eichwald) is more compressed with narrow, ribbed caudal projection. Unfortunately, we cannot be certain of the apertural characters in our specimen. Pyrgo williamsoni (Silvestri) (Text-fig. 14, nos 1-3) Biloculina ringens, typica Williamson, 1858 : 79, pi. 6, figs 169, 170; pi. 7, fig. 171 (not Miliolites ringens Lamarck). Biloculina williamsoni Silvestri, 1923 : 73. Pyrgo williamsoni (Silvestri) Loeblich & Tappan, 1953 : 48, pi. 6, figs 1-4, ? 2; Feyli
. Bulletin of the British Museum (Natural History). Zoology . CARDIGAN BAY RECENT FORAMINIFERA 61 in size. P. appendiciilata (Eichwald) is more compressed with narrow, ribbed caudal projection. Unfortunately, we cannot be certain of the apertural characters in our specimen. Pyrgo williamsoni (Silvestri) (Text-fig. 14, nos 1-3) Biloculina ringens, typica Williamson, 1858 : 79, pi. 6, figs 169, 170; pi. 7, fig. 171 (not Miliolites ringens Lamarck). Biloculina williamsoni Silvestri, 1923 : 73. Pyrgo williamsoni (Silvestri) Loeblich & Tappan, 1953 : 48, pi. 6, figs 1-4, ? 2; Feyling-Hanssen, 1964 : 264, pi. 7, figs 5, 6; pi. 8, figs 3-5. Diagnosis. A globose, ovate species of Pyrgo in which the penultimate chamber protrudes from the final chamber which clasps it all round. Tooth strongly bifid with long, divergent tines. Description. Test globose, ovate in outline, thicker than wide and somewhat square in section; chambers arranged in an embracing spiroloculine series the final one clasping the penultimate all round and much larger; penultimate chamber protruding; suture distinct, impressed, the sides of the chambers flattened towards it at midpoint; wall imperforate porcelaneous, smooth; aperture terminal, oval,. Fig. 14. 1-3. Pyrgo williamsoni. 1, side view; 2, apertural (top) view; 3, oblique side view. 4-6. Pyrgo species A. 4, side view; 5, apertural view; 6, edge 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). London : BM(NH)
Size: 1941px × 1287px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
