J. W. S. Macfie 
279 
Fig. I. Spirochaela vrethrae Macfie. All the figures were drawn with an Abbe-Zeiss 
camera lucida at a magnification of 2000 diameters. (1-64), various forms found 
in the urethral discharge; (65-66), degenerated forms with cyst-like swellings; 
(67-70), spirochaetes with indistinct waves found in specimens that had been allowed 
to die slowly at the laboratory temperature. 
