-5- 
Harshbarger, J. C., E. R. Jacobson, C. E. Smith, and J. A. Couch. 
1980. Hematopoietic neoplasms in invertebrates and cold-blooded 
vertebrates. In: Advances in comparative leukemia research, D. 
Yohn, B. Lapin and J. Blakeslee, ed., pp. 223-225, Elsevier: 
New York. 
Sindermann, C. J., F. E. Bang, N. 0. Christensen, V. Dethlefsen, 
J. C. Harshbarger, J. R. Mitchell, and M. F. Mulcahy. 1980. 
The role and value of pathobiology in pollution effects monitor¬ 
ing programs. Rapp. P.-v. Rdun. Cons. int. Explor. Mer, 179 : 135- 
151. 
Harshbarger, J. C. (in press). Neoplasms in zoo poikilotherms em¬ 
phasizing cases in the Registry of Tumors in Lower Animals. Pro¬ 
ceedings of the Symposium on the Comparative Pathology of Zoo Ani¬ 
mals, October 2-4, 1978, Washington, D. C. 
Chang, S. C., J. C. Harshbarger, and S. V. Otto, (in press). Status 
of cytoplasmic prokaryote infections and neoplasms in bivalve mol- 
lusks. Proceedings of the Sixth Food and Drug Administration Sci¬ 
ence Symposium on Aquaculture: Public Health, Regulatory, and Manage¬ 
ment Aspects, February 12-14, 1980, New Orleans, Louisiana. 
SELECTED ACTIVITIES IN 1979 
A. Research activities : 
1. Studied, diagnosed and described for the files approximately 
180 cases of diseases in cold-blooded vertebrates and inverte¬ 
brates. 
2. Collaborated with Karen L. Hoover (National Cancer Institute) 
and Sing C. Chang on the study of cubic nuclear protein inclu¬ 
sions in ganglion cells of emerald shiner from the Ohio River. 
3. 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. 
4. Collaboratored 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 commercialls . 
5. Collaborated with Clyde J. Dawe (National Cancer Institute, 
Bethesda, Md.), Louis E. Delanney (Bar Harbor, Me.) and Sing 
C. Chang on the fine structure of mastocytomas in the axolotl, 
Ambystoma mexicanum . 
