PLATE V 



sassiua&Jv^jisasifisa 



Fig. 2. 



(a) 



—intact cells (phase-contrast 90 X 7); (i)— same after lysis in 0-64 M-sucrose; 

 (c)— intact cells (dark field 8x7); (i)— same after lysis in 0-44 M-sucrose. 



A. I. OPARIN 



