J L 



Centimeters 



FiGunE 6. — C. gigas. Adult oyster grown in Willapa Harbor, Wash., from seed imported from Japan. Dimensions: 

 height 14 cm., length 9 cm. (a) exterior of lower (left) valve; (b) interior of upper (right) valve. 



3 



Centimeters 



Frii-re 7. — C. roiiitiifrciaHs. Kaneohe Bay, Oahu Island, Hawaii. Dimensions: height 7 cm., length 4.S cm. (a) exterior 



of lower (left) valve; (b) interior of upper (right) valve. 



10 



FISH AND WILDLIFE SERVICE 



