ACTIVITIES REPORT 
REGISTRY. OF- TUMORS IN LOWER ANIMALS: 1981 SUPPLEMENT 
JOHN C. HARSHBARGER, DIRECTOR 
PREPARED FOR DISTRIBUTION BY: 
REGISTRY OF TUMORS IN LOWER AJJIMALS 
NATIONAL MUSEUM OF NATURAL HISTORY 
ROOM W216-A 
SMITHSONIAN INSTITUTION 
WASHINGTON, D. C. 20560 
NTH Contract No. NOl CP 33874 (Contractor: Smithsonian^ 
