Pelagic Snails: The Biology of Holoplanktonic Gastropod MollusksLucid line drawings and photos, 16 in fine color. Based on some 15 years of study and collection in both polar regions and most areas of the tropics and temperate zones. Detailed treatment is given on all known pelagic snails (aoubt 140 species) including: external anatomy, swimming and buoyancy mec |
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Contents
References Cited | 6 |
The Heteropods | 27 |
The Thecosomes | 58 |
The Gymnosomes | 167 |
The Planktonic Nudibranchs | 214 |
Glossary | 239 |
249 | |
Common terms and phrases
abundant adult anatomy animals appear associated atlantids attached Biol body buccal carbonate cavity Cavolinia cavoliniids changes Clio Clione collected Color contain depth described distribution euthecosomes Family feeding female fish float foot gastropods genus Gilmer gland growth gymnosomes helicina heteropods hooks increase indicate individuals ingested Janthina known laboratory Lalli larger larvae lateral length Limacina lines living lobes male mantle marine mass mating mollusks mouth nature nudibranchs observed occurs Ocean opening organ paired parasitic pelagic periods pers Phylliroë placenta planktonic Pleistocene position predators present preserved prey proboscis produced pseudoconch Pseudothecosomata pteropods radula range rates relative remain reported reproductive retroversa sediments shell similar single sinking species specimens Spoel stage structure studies suggested surface swimming Table teeth tentacles thecosomes veliger ventral weight wings young zooplankton