REFERENCES

Arkell, W. J., Kummel, B., & Wright C. W. 1957. Mesozoic Ammonoidea, p. L80-L490. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America & University of Kansans Press, Lawrence, Boulder, Colorado & Lawrence, Kansas.

Batt R. J. 1989. Ammonite shell morphotype distributions in the Western Interior Greenhorn Sea and some paleoecological implications. Palaios, 4: 32-42.

Chamberlain J. A. 1976. Flow patterns and drag coefficients of cephalopod shells. Palaeontology, 19: 539-563.

Chamberlain J. A. 1980. Motor performance and jet propulsion in Nautilus: implications for cephalopod paleobiology and evolution. Bulletin of the American Malacological Union, 123-127.

Chamberlain J. A. 1991. Cephalopod locomotor design and evolution. the constraints of jet propulsion, p. 57-98. Biomechanics in Evolution, Society for Experimental Biology Seminar Series 36. Cambridge University Press, Cambridge, UK.

Crick G. C. 1898. On the muscular attachment of the animal to its shell in some Fossil Cephalopoda (Ammonoidea). Transactions of the Linnaean Society of London (Zoology), 7: 71-113.

Denton E. J. 1973. On buoyancy in the lives of modern and fossil cephalopods. Proceedings of the Royal Society of London Series B, 185: 273-299.

Denton E. J. & Gilpin-Brown J. B. 1961b. The buoyancy of the cuttlefish Sepia. Journal of the Marine Biological Association of the United Kingdom, 41: 319-342.

Denton E. J. & Gilpin-Brown J. B. 1961c. The effect of light on the buoyancy of the cuttlefish. Journal of the Marine Biological Association of the United Kingdom, 41: 343-350.

Denton E. J. & Gilpin-Brown J. B. 1961a. The distribution of gas and liquid within the cuttlebone. Journal of the Marine Biological Association of the United Kingdom, 41: 365-381.

Doguzhaeva L. and Mutvei H.1993. Structural features in Cretaceous ammonids indicative of semi-internal or internal shells, p. 99-114. In House, M. R. and Senior, J. R. (eds.), The Ammonoidea. Systematics Association Special Volume 47. Clarendon Press, Oxford, UK.

Ebel K. 1992. Mode of life and soft body shape of heteromorph ammonites. Lethaia, 25: 179-193.

Geczy B. 1960. A Neoammoideak eletmodjarol . Foldtani Kozlony Magyar Foldtani Tarsulat, 90: 200-203.

Jacobs D. K. and Landman N. H. 1993. Nautilus—A poor model for function and behaviour of ammonoids? Lethaia, 26: 101-188.

Kakabadzé M. V, and Sharikadzé M. Z. 1993. On the mode of life of heteromorph ammonites heterocone, ancyclocone, ptychocone), p. 209-215. In S. Elmi, C. Mangold and Y. Almeras (eds.), 3-eme Symposium international sur le Cephalopodes actuels et fossiles. Geobios Memoire Special 15.

Klinger, H. C. 1980. Speculations on Buoyancy Control and Ecology in some Heteromorph Ammonites, p. 337-355. In House, M. R. and Senior, J. R. (eds.), The Ammonoidea. Systematics Association Special Volume 18. Academic Press, London, UK.

Lebrun P. 1996. Ammonites. Minéraux et Fossiles, Hors-Série 4: 1-96.

Lehmann U. & Weitschat W, 1973. Zur Anatomie und Okologie von Ammoniten: Funde von Kropf und Kiemen. Paläontologische Zeitschrift, 47: 69-76.

Lehmann U. 1981. The Ammonites. 246 pp. Cambridge University Press, Cambridge, UK.

Lewy Z. 1996. Octopods: Nude ammonoids that survived the Cretaceous-Tertiary boundary mass extinction. Geology, 24: 627-630.

Marcinowski R. & Wiedmann J. 1990. The Albian ammonites of Poland. Palaeontologica Polonica, 50: 1-94.

Matsumoto T. & Nihongi M. 1979. An interesting mode of occurrence of Polyptychoceras (Cretaceous Heteromorph Ammonoid). Proceedings of the Japan Academy Series B, 55: 115-119.

Monks N., Hardwick J. D., and Gale A. S. 1996. The function of the belemnite guard. Paläontologische Zeitschrift, 70: 425-431.

Shigeta Y. 1993. Post-hatching and early life history of Cretaceous ammonoidea. Lethaia, 26: 133-145.

Trueman A. E. 1941. The ammonite body-chamber, with special reference to the buoyancy and mode of life of the living ammonite. Quarterly Journal of the Geological Society of London, 384: 339-383.

Vermeij G. J. 1993. A Natural History of Shells. Princeton University Press, New Jersey, USA. vii + 207 pp, 22 pls.

Ward P. D. 1979. Functional morphology of Cretaceous helically-coiled ammonite shells. Paleobiology, 5: 415-422.

Ward P. D. 1986. Cretaceous ammonite shell shapes. Malacologia, 27: 3-28.

Ward P. D., Stone R., Westermann G. E. G. and Martin, A. 1977. Notes on animal weight, cameral fluids, swimming speed and colour polymorphism of the cephalopod Nautilus macromphalus in the Fiji Islands. Paleobiology, 3: 377-388.

Wells M. J. 1987. Ventilation and oxygen extraction by Nautilus, p. 339-350. In W. B. Saunders and N. H. Landman (eds.), Nautilus: The Biology and Palaeobiology of A Living Fossil. Plenum Press, New York, USA.

Wells M. J. and Wells J. 1985. Ventilation and oxygen uptake by Nautilus. Journal of Experimental Biology, 118: 297-312.

Wells M. J., Wells J., and O’Dor R. K. 1992. Life at low oxygen tensions: the behaviour of Nautilus pompilius and the biology of extinct forms. Journal of the Marine Biological Association of the United Kingdom, 72: 313-328.

Westermann G. E. G. 1996. Ammonoid life and habit, 607-707. In Landman N. H., Tanabe K., Davis R. A. (eds.), Ammonoid Paleobiology, Topics in Geobiology Volume 13. Plenum Press, New York, USA.