The character derived from the adductor ridge, just alluded to, is remarkable.
There is no hollow or crest for the adductor muscle, which is small.
Thus, when the valves are closed, there is always a strain upon the adductor to overcome the elastic resistance of the cartilage.
The orbit is not completely walled off from the adductor chamber.
Finally there is evidence for an adductor between the temporal and masseter masses.
There is a deep and conspicuous pit for the adductor muscle.
Neither is there anatomical evidence for an adductor arising from the quadrate wing of the pterygoid.
In one leg, the entire muscle is indistinguishably fused with M. adductor profundus and they appear as a single muscle.
The thickness of the valve sometimes varies a little, and when thick the adductor ridge does not appear quite so prominent.
When a pelecypod dies and the pull of the adductor muscles is released, the valves gape open.
adductor ad·duc·tor (ə-dŭk'tər)
A muscle that draws a body part, such as a finger, an arm, or a toe, inward toward the median axis of the body or of an extremity.
A muscle that draws a limb or part of a limb toward the midline of the body. Compare abductor.