. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS. hand its secreting part is especialh' developed, and its mnscnlar wall somewhat more complicated. In the part of the M. compressor forming the mnscnlar wall of the bag, the direction of the fibres may be rather different, bnt they chiefly radiate in bent lines towards the periphery, or round this to the dorsal surface; this latter is only by loose connective tissue / i \ connected with the ray-muscles. In the part in the shaft th
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS. hand its secreting part is especialh' developed, and its mnscnlar wall somewhat more complicated. In the part of the M. compressor forming the mnscnlar wall of the bag, the direction of the fibres may be rather different, bnt they chiefly radiate in bent lines towards the periphery, or round this to the dorsal surface; this latter is only by loose connective tissue / i \ connected with the ray-muscles. In the part in the shaft the / I \ direction is more straight, parallel to the axis; this is the case with the fibres covering the lateral surface of the appendix-stem (or a short proximal part of it), as also with those forming the outer, lateral border of the appendix-slit. This lateral part most frequently appears on the dorsal side as an independent muscle, and might be called the outer lip-muscle;, being, as it were, separated from the other part of the wall of the bag by the at- tachment of the fin-membrane. By a closer examination and by a transverse section through this region (cp. fig. i and 14 in the text) I have been convinced of its forming a whole with the other parts of the muscular wall of the bag, with which also the corre- .sponding part in the Holocephales forms a complete union (see later). A large part of this outer lip-muscle > originates anterior- ly from the piece /3 and the hindmost ray, or rays; posteriorly it is inserted partly on the inner investment of the ventral marginal cartilage, partly on the aponeurotic covering of the ventral termi- nal , and acts through this especially on the piece Tv. The muscular coat formed by J/, compressor will b\' contracting expel the fluid secreted from the epithelium of the bag; bnt besides its hindmost, lateral part, the outer liiD-muscle», when it is long and powerfully developed (as in Sharks with a short ventral marginal cartil
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
