HEART 



RECTUM 



MUSCLE 



GILLS 



HINGE 



MOUTH 



PALPS 



MANTLE 



B 



Figure 2. — Photograph (A) and diagram (B) showing main features of the anatomy 

 of the oyster lying In Its left shell and having the right shell and right half of the 

 mantle removed. Detailed description of anatomy is given in text. 



