-5- 
2. Collaborated with Sara V. Otto (Maryland Department of Natural 
Resources, Oxford, Md.) and Sing C. Chang on the incidence, 
distribution, cellular structure and fine structure of chlamy¬ 
dia, rickettsia and mycoplasma parasites in bivalve mollusks. 
3. Collaborated with Peter H. Wolf (New South Wales State 
Fisheries, Sydney, Australia) and Sing C. Chang on the fine 
structure of papillary epitheliomas of the mantle in the 
Sydney rock oyster, Crassostrea commerclalls . 
4. Collaborated with John J. Black and Robert F. Zeigel on 
hepatocellular carcinoma and other lesions in sauger and 
walleye from copper polluted Torch Lake, Michigan. 
B. Other activities ; 
1. Member of the World Committee of the International Associ¬ 
ation for Comparative Research on Leukemia and Related Diseases. 
2. Member of the Interagency Collaborative Group on Environmental 
Carcinogenesis. 
3. Member of the Permanent Program Committee and Chairman of the 
Admissions Committee of the Society for Invertebrate Pathology. 
4. Member of the Organizing Committee of The Eleventh International 
Symposium of The Princess Takamatsu Cancer Research Fund: Phy- 
letic Approaches to Cancer. 
5. Member of the Editorial Board of the "Journal of Fish Diseases". 
6. President of the Washington, D. C. Chapter of Sigma Xi, The 
Scientific Research Society. 
7. Attended the Foundation for Advanced Education in the Sciences’ 
course, "Malformation in developmental biology," National 
Institutes of Health, Bethesda, Md., Spring 1980. 
C. Meetings ; 
1. Presented with Sing C. Chang, "Status of cytoplasmic pro¬ 
karyote infections and neoplasms in bivalve mollusks," at 
the Sixth FDA Science Symposium: Aquaculture — Public 
Health, Regulatory, and Management Aspects, February 12-14, 
1980, New Orleans, Louisiana. 
2. Participated in a molluscan workshop at the Xlllth Annual 
Meeting of the Society for Invertebrate Pathology, July 27- 
August 1, 1980, Seattle, Washington. 
