ANODONTA 



3. Side view with the labial palps and gill plates of left side pinned back. Inner lamella of inner 

 gill plate attached to the foot anteriorly, free medianly and fused with the corresponding lamella of 

 the other side posteriorly. Inner and outer gill plates of the right side. Probe passed between the 

 foot and the middle portion of the inner gill plate into the epibranchial chamber. Apertures of the 

 left kidney exposed by cutting forward through the attachment of the inner gill plate to the foot, and 

 of the generative gland slightly in front of the aperture of the kidney. 



70 



