MOUTH 



LABIAL PALPS 

 CEREBRAL GANGLION 



LEFT MANTLE 



PERICARDIUM 



RIGHT MANTLE 



GILLS 



ADDUCTOR MUSCLE 



SHELL 

 TENTACLES 



FUSION OF TWO MANTLE 

 LOBES AND GILLS 



X 



_L 



_L 



CENTIMETERS 



Figure 7. Anatomy of the ovster ( Crassostrea virginica ) and diagram showing the 

 correct method of measuring the height, length, and width of oyster shells (from 

 Galtsoff 1964). 



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