Literature
  • 1936
  • Pantopoda. Die Tierwelt der Nord- und Ostsee, XIa: 1-5.
  • 2000
  • Paralarval gonatid squids (Cephalopoda: Oegopsida) from the mid-North Atlantic. Proc. Biol. Soc. Wash. 113(2): 532-541.
  • 1997
  • Pelagic Molluscs of the World. World Biodiversity Database CD-ROM Series. Version 1.0. ETI, University of Amsterdam, Amsterdam.
  • 1968
  • Pelagic ostracods of the Sargasso Sea off Bermuda. Bulletin of the Peabody Museum of Natural History, Yale University, 26: I-125.
  • , 1997
  • Penaeoid and sergestoid shrimps and prawns of the world. Mém. Mus. nat. Hist. nat. Vol. 175. Paris. 233 pp.
  • 1957
  • Phoronidea. Family Phoronidea. Actinotrocha larvae. Fiches d'Identification du Zooplancton, 69 (
  • 2000
  • Phylogenetic relationships among loliginid squids (Cephalopoda: Myopsida) based on analyses of multiple data sets. Zool. J. Linn. Soc., 130: 603–633.
  • 1976
  • Phylogeny, ontogeny and morphology of living and fossil Thaumatocypridacea (Myodocopa: Ostracoda). Smithsonian Contribution to Zoology, 219, 1-124.
  • , 1980
  • Plankton of the Fladen Ground during FLEX 76. I. Spring development of the plankton community. Marine Biology, 57: 73-78.
  • , 1980
  • Plankton of the Fladen Ground during FLEX 76. II. Population dynamics and production of Thysanoessa inermis (Crustacea: Euphausiacea). Marine Biology, 57: 79-86.
  • , 1988
  • Plankton time-space dynamics in German Bight — a systems approach. Oecologia, 77(4): 487-496.
  • 1957
  • Plymouth marine fauna. Third edition,
  • 1961
  • Polycaheta larvae. Families Spionidae, Disomidae, Poecilochaetidae. Fiches d'Identification du Zooplancton, 91 (
  • 1953a
  • Polychaeta. Families: Aphroditidae, Phyllodocidae and Alciopidae. Fiches d'Identification du Zooplancton, 52 (1953). Conseil International pour l'Exploration de la Mer, Kopenhagen.
  • 1953b
  • Polychaeta. Families: Tomopteridae and Typhoscolecidae. Fiches d'Identification du Zooplancton, 53 (1953). Conseil International pour l'Exploration de la Mer, Kopenhagen.
  • 1999
  • Polychaeta. Family Phyllodocidae. Fiches d'Identification du Zooplancton, 183 (
  • 1967
  • Polychaeta. Family Syllidae, sub-family Autolytinae. Fiches d'Identification du Zooplancton, 113 (
  • 1955
  • Polychaete worms of the far-eastern seas of the USSR. Keys to the fauna of the USSR, 56: 1-443.
  • , 1991
  • Polychaetes: British phyllodocoideans, typhloscolecoideans and tomopteroideans. Synopses of the British Fauna (New Series), 45. 202 pp.
  • 1935a
  • Polypdyr (Coelenterata). I. Ferskvandspolypper og goplepolypper. Danmarks Fauna 41: 1-207.
  • 1937
  • Polypdyr (Coelenterata). II. Goepler. Danmarks Fauna 43: 1-123.
  • 1965
  • Polyzoa (Bryozoa). Order Cheilostomata: cyphonautes larvae. Fiches d'Identification du Zooplancton, 107 (
  • 1978a
  • Population dynamics and production of euphausiids. I. Tyhysanoessa longicaudata in the North Atlantic Ocean. Marine Biology, 46: 121-130.
  • 1983
  • Proceedings of the Symposium on the North Sea dynamics, Hamburg, September 1981. Springer Verlag.
  • , 1970
  • Prosobranchia. Veliger larvae of Taenoglossa and Stenoglossa. Fiches d'Identification du Zooplancton, 129-132 (
  • 1972
  • Pteropoda Thecosomata. Fiches d'Identification du Zooplancton, 140-142 (
  • 1947
  • Pteropoda Thecosomata. Fiches d'Identification du Zooplancton, 8 (
  • 1891
  • Pycnogonidea. The Norwegian North-Atlantic Expedition, 1876-1878, XX: 1-163.