. Contributions to Canadian biology. Marine biology; Natural history. 186 DEPARTMENT OF THE XAVAL SERVICE are for the purpose of increasing the surfaces for the attachment of the muscle fibres. The edges of the flat disc are thinner than the central portion, so that a cross-section of the narrow end where there are no keels has very much the appearance represented by figure 2. Fig. 2, Diagrammatic outline <yf the naked eye appearance of a cross-section of the flexor tendon towards its narrow end, that is, the end which is distal to the dactyl. On the other hand a transverse section close to
. Contributions to Canadian biology. Marine biology; Natural history. 186 DEPARTMENT OF THE XAVAL SERVICE are for the purpose of increasing the surfaces for the attachment of the muscle fibres. The edges of the flat disc are thinner than the central portion, so that a cross-section of the narrow end where there are no keels has very much the appearance represented by figure 2. Fig. 2, Diagrammatic outline <yf the naked eye appearance of a cross-section of the flexor tendon towards its narrow end, that is, the end which is distal to the dactyl. On the other hand a transverse section close to the ojiposite end shows a section of one keel and of the two leaves of the disc. The reason that both keels do not show is because one keel develops further back on the disc on one side than on the other. Figure 3 illustrates the appearance of a transverse section from that end of a flexor tendon which lies nearest the proximal end of the free Pig. 3. represents cross-sections of the two keels, jvhile C represents a section of the larger portion of the oval plate or disc; the smaller portion is out of the plane of 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 Biological Board of Canada; Canada. Marine Biological Station. Toronto, Biological Board of Canada
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