FISHERY BULLETIN: VOL. 86, NO. 3 



Figure 1 1.— Low magnification view of Ostrea edulis from California (WAC-2-29). Note diffuse inflammatory infiltrate 

 in vesicular connective tissue. 100 x. HHE stain. 



Figure 12.— Microcell infection in Ostrea edulis (specimen WAC-2-19) from population of oysters introduced into Califor- 

 nia waters from Milford, CT. 1,000 X. HHE stain. 



Figure 13.— Microcell infection in hemocytes in Ostrea edulis transported from Milford, CT to Chincoteague Bay, VA 

 in 1962 (first diagnosed case oi Bonamia ostreae). 1,000 x. HHE stain (specimen FK-5-1). 



Figure 14.— Microcell infection in Ostrea edulis. Transferred from Milford, CT to Oxford, MD recirculated seawater 

 aquarium. Cells of the vesicular connective tissue are infected. 100 x . HHE stain (specimen FMT-B-1-3). 



Figure 15.— Microcell infection in vesicular connective tissue and hemocytes of Ostrea lurida from Yaquina Bay, 

 OR. 1,000 X. FPM stain (specimen WAO-7A-41). 



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