9 
19„ Induction of hepatocellular and choliangiocellular 
neoplasms in guppies with azo compounds [Khudolei, 
V. Vo Jo Ichthyol. (English translation of Voprosy 
Ikhtiologii), 1,2: 319-324, 1972], in guppies and 
zebra fish with diethylnitrosamine [Stanton, M. F 0 
J. Natlo Cancer Insto, 34,: 117-130, 1965] with di- 
methylnitrosamine [Khudolei, V. V c Vopr. Onkol., 19 : 
88-94, 1973], and with nitrosomorpholine [Khudolei, 
Vo Vo (in press)] 0 
20o Induction of hepatomas in trout and salmon with 
aflatoxin B-^, aflatoxin plus cyclopropene, 
urethane, dimethyInitrosamine, acetylaminofluorene, 
aminoazotoluene, para-dimethylaminoazobenzene and 
DDT and nephroblastomas in rainbow trout with di¬ 
me thy lnitrosamine [Reviewed by Wales, J„ H. and 
by Ashley, L. M 0 In: A Symposium on Diseases of 
Fishes and Shellfishes , So F„ Snieszko (ed 0 ), 
Am. Fisheries Soc 0 Special Pub. No. 5, 1970, 
pp. 351-365 and 366-379 respectively]. Examples 
of induced hepatomas and nephroblastomas in 
rainbow trout contributed by Dr. L. M. Ashley; 
RTLA 296-326. 
21. Induction of papillomas and adenomas in apple 
snails by 20-methylcholanthrene and 3,4-benz¬ 
pyrene (RTLA 269). [See review: Krieg, K„ 
Invertebraten in der Geschwulstforschung . 
Beitr&ge zur Krebs forschung, Vol. 12, Verlag 
Theodor Steinkopff: Dresden, 215 pp„, 1973]. 
PERSONNEL 
The Project Officer for the contract is Dr. Clyde J„ Dawe, Head, 
Comparative Oncology Section, Laboratory of Pathology, National Cancer 
Institute, National Institutes of Health, Bethesda, Maryland, 20014. 
The Principal Investigator for the contract is Dr. David L. Pawson, 
Chairman, Department of Invertebrate Zoology, National Museum of Natural 
History, Smithsonian Institution, Washington, D.C., 20560. 
The Staff of the Registry is as follows: 
Director - John C. Harshbarger 
Registrar - Phyllis M. Schellenger 
Histopathology Technician - Linda J. Cullen 
Bibliographers - Judy E. Foster and Marilyn S. Slatick 
