ANODONTA 



1. Anodonta. View of the animal lying in the right valve of the shell, the left having been 

 removed by carefully separating from it the edge of the mantle and cutting through the attachment of 

 the two adductor muscles to the shell (keep the edge of the knife close to the shell). Left lobe of 

 mantle ; thickened free edge of same ; right lobe of mantle ; margin of posterior border of mantle-flap 

 twice indented so as to form two incomplete siphons dorsal and ventral, the latter with tentaculiferous 

 margin ; anterior adductor ; posterior adductor ; anterior retractor ; posterior retractor ; protractor. 



2. Side view of animal with left lobe of mantle turned back. Foot ; labial palps ; gills ; line of 

 attachment of outer gill with mantle. Right mantle-lobe ; dorsal siphon ; ventral siphon. 



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