MITOCHONDRIA ASCARIS. 263 



DESCRIPTION OF PLATES. 



All figures are camera drawings, made with a Spencer microscope; achro- 

 matic, homog. immersion lens, 1.8 mm., N. A. 1.30; tube length 165 mm.; 

 and projection distance 420 mm. 



Figures 1-14 are reproduced at an enlargement of 4,000 diameters (compen- 

 sating ocular 18x, Zeiss); Figures 15 and 16 an enlargement of 1700 diameters 

 (compensating ocular 9x, Zeiss). In reproducing Figures 15 and 16 they 

 were reduced to f original size, so that their magnification on the plate is 

 1133 diameters. 



Abbreviations. 



cp. rfr. refractive body 

 kchnd. karyochondria 

 plstchnd. plastochondria 

 vs. rfr. refringent vesicles 



