. The biology of marine animals. Marine animals; Physiology, Comparative. 214 THE BIOLOGY OF MARINE ANIMALS pedal gland in Vermetus, and by the propodium in Capulus. The latter structure is an anterior extension of the foot, to which food particles are conveyed from the mantle cavity and from which they are collected by a grooved proboscis. An interesting variation is the development in Stephopoma of a sweeping mechanism for supplementing collection of particles within the mantle cavity. The long anterior filaments of the gill are extended and drawn through the water like a sweep-net, and any
. The biology of marine animals. Marine animals; Physiology, Comparative. 214 THE BIOLOGY OF MARINE ANIMALS pedal gland in Vermetus, and by the propodium in Capulus. The latter structure is an anterior extension of the foot, to which food particles are conveyed from the mantle cavity and from which they are collected by a grooved proboscis. An interesting variation is the development in Stephopoma of a sweeping mechanism for supplementing collection of particles within the mantle cavity. The long anterior filaments of the gill are extended and drawn through the water like a sweep-net, and any particles encountered are trapped in the mucus which coats the filaments (52, 76, 110, 115). Shelled pteropods (opisthobranchs) are another group of gastropods making use of ciliary feeding (Fig. ). In Limacina, for example, Food pouch Outward tract. Food channel. 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 Nicol, J. A. Colin (Joseph Arthur Colin), 1915-. New York, Interscience Publishers
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