. Animal physiology. Physiology, Comparative; Physiology, Comparative. RESPIRATION IN MOLLUSCA. 247. these are united, so as to shut in the gills, there are two orifices, often prolonged into tubes (as in the Tellina, Fig. 143), through one of which the water is drawn in for the purpose of respiration, whilst through the other it passes out, as in the Tunicata. In the aquatic Gasteropoda there is scarcely any part of the body to which we do not find the gills attached in some species or other. In the naked marine species, which may be called Sea-slugs, they form fringes, which are sometimes di
. Animal physiology. Physiology, Comparative; Physiology, Comparative. RESPIRATION IN MOLLUSCA. 247. these are united, so as to shut in the gills, there are two orifices, often prolonged into tubes (as in the Tellina, Fig. 143), through one of which the water is drawn in for the purpose of respiration, whilst through the other it passes out, as in the Tunicata. In the aquatic Gasteropoda there is scarcely any part of the body to which we do not find the gills attached in some species or other. In the naked marine species, which may be called Sea-slugs, they form fringes, which are sometimes disposed along the sides of the body, as in the Glaucus and Tritonia, sometimes arranged Fig. 143 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 Carpenter, William Benjamin, 1813-1885. London : Wm. S. Orr and Co.
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