Twelfth Annual Report of the Bureau of Science— 1913.] 



>• j^' . , -^^ '•• .:» • 



i* .,.. '^. .- 

 ' >|* » 4 '4*' 



» • 





•y 







4t 





y'' 





'. f* 



i- 



*f* 



•A ^ • • • 



- > s 



PLATE VIII. SECTION OF A MESENTERIC LYMPH GLAND OF MONKEY, SHOWING SEV- 

 ERAL BALANTIDIUM COLI HOMINIS IN THE EDGE OF THE GLANDULAR TISSUE. 



