. The biology of marine animals. Marine animals; Physiology, Comparative. Fig. A Luminescent Shark Spinax niger, with the Luminous Areas Lighted Up. (From a drawing by Horsfall in Dahlgren, 1917.). Pigment layer Light cells Fig. Light Gland of the Shark Spinax niger. (After Johann (35), and Dahlgren, 1917.) the free surface there is a lens for concentrating the light produced (Fig. ). In certain other forms, such as Cyclothone and Gonostoma, the photophores are similar in structure but are provided with a long duct leading to the exterior (Fig. ). Morphologically the va
. The biology of marine animals. Marine animals; Physiology, Comparative. Fig. A Luminescent Shark Spinax niger, with the Luminous Areas Lighted Up. (From a drawing by Horsfall in Dahlgren, 1917.). Pigment layer Light cells Fig. Light Gland of the Shark Spinax niger. (After Johann (35), and Dahlgren, 1917.) the free surface there is a lens for concentrating the light produced (Fig. ). In certain other forms, such as Cyclothone and Gonostoma, the photophores are similar in structure but are provided with a long duct leading to the exterior (Fig. ). Morphologically the various structures are derived from the epidermis. In the midshipman Porichthys notatus, a shallow-water fish of the west coast of North America, Greene has traced the development of the photophores from free epithelial buds which are. 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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