Bull- U. S. B. F. 1912. 



Platk LVII. 



Fig. 3. — Rainbow trout. Redrawn from Gilruths colored original. 1903. Large tumor on each side of branchial 

 junction. Gill fringe disteudei! on surface of lower one. 



KiG. 4a. — Yearling liybrid s;tlnion. Massive tumors and marked emaciation. I.ot 19SSa. 



Fig. 4b. — Two year old Sahtio srdag^o. extreme emaciation. I.ot ls*.Vi. 



^ 



Fig. 4. — Saitno /onthta/is 2 years old. First external evidence of tumor in base of muscular structure of istlnnus, 

 showing marked infiltrative tendency of growth. 



