. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. A, 13, C, D. Discoidea cylindrica (Lamarck), Upper Chalk, Swaffham, Norfolk. In (Jeol. Dept., National Museum of Wales. Keg. no. 15. 15G. G. 8. A. Profile (p, periproctal system), nat. size. B. Plan of adoral surface (m, month-opening), nat, size. 0. Periproctal plates, X 12. I). Ditto, side view (a, anal aperture), X 12. E. Pei'iproctal plates of Discoidea minima, Agassiz, enlarged (after Wright). adoral surface of the test, and is surrounded by the peri- proctal plates, whic
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. A, 13, C, D. Discoidea cylindrica (Lamarck), Upper Chalk, Swaffham, Norfolk. In (Jeol. Dept., National Museum of Wales. Keg. no. 15. 15G. G. 8. A. Profile (p, periproctal system), nat. size. B. Plan of adoral surface (m, month-opening), nat, size. 0. Periproctal plates, X 12. I). Ditto, side view (a, anal aperture), X 12. E. Pei'iproctal plates of Discoidea minima, Agassiz, enlarged (after Wright). adoral surface of the test, and is surrounded by the peri- proctal plates, which slope from it in all directions, giving the whole system the appearance of a low boss (text-fig., A^ &D). The periproctal plates are nineteen in number, arranged in two cycles of nine plates each, with one odd pentagonal. 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 London, Taylor and Francis, Ltd
Size: 1627px × 1536px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
