ACTIVITIES REPORT 
REGISTRY OF TUMORS IN LOWER ANIMALS: 
1974 SUPPLEMENT 
JOHN C. HARSHBARGER, DIRECTOR 
PREPARED FOR DISTRIBUTION BY: 
REGISTRY OF TUMORS IN LOWER ANIMALS 
NATIONAL MUSEUM OF NATURAL HISTORY 
ROOM W-216A 
SMITHSONIAN INSTITUTION 
WASHINGTON, D.C. 20560 
JUNE 1975 
