The Shipley Collection of Scientific Papers, Том 1641833 |
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The muscles of the brushes consist of two pairs , an external and an internal ( Figs . 1 and 2 ) . Both pairs arise from the dorsal wall of the head - capsule , and their points of origin coincide with certain sym- metrical patches of ...
The muscles of the brushes consist of two pairs , an external and an internal ( Figs . 1 and 2 ) . Both pairs arise from the dorsal wall of the head - capsule , and their points of origin coincide with certain sym- metrical patches of ...
Страница 105
The remaining muscles of the head which have yet to be dealt with are those belonging to the mouth - parts ( Fig . 2 ) , and the most prominent of them are the muscles of the mandibles . Each mandible is moved by a pair of stout muscles ...
The remaining muscles of the head which have yet to be dealt with are those belonging to the mouth - parts ( Fig . 2 ) , and the most prominent of them are the muscles of the mandibles . Each mandible is moved by a pair of stout muscles ...
Страница 107
... muscles is much modified , and many of the muscles come to lie nearer the digestive canal . Just in front of each nerve ganglion , a transverse band crosses the nerve cord , and passes along the line of junction of two adjacent segments ...
... muscles is much modified , and many of the muscles come to lie nearer the digestive canal . Just in front of each nerve ganglion , a transverse band crosses the nerve cord , and passes along the line of junction of two adjacent segments ...
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