PLATE 5 
EXPLANATION OF FIGURES 
69 to 85 Were all drawn from living spermatozoa which had been treated with 
hypotonic solutions of salts, and show: various stages in the eversion of the cap- 
sule; r., the collar; c.b., central body; 7.t.e., everted inner tubule; cnv.c. inverted 
capsule; g, g' and g?, pieces of the central body on the everted wall of the inner 
tubule. 
86 to 87 Spermatozoa which were exploded in distilled water, fixed in Morgan’s 
fluid, then stained with thionin and eosin. 
88 to 92 Everted spermatozoa extending through the shell of the egg, from 
the lumen of the ovary; fixed in Morgan’s fluid. In figure 89 the shell of the egg 
is badly warped; c.b. ejected central body; inv.c., inverted capsule; n.c., nuclear 
cup; r., collar of the capsule; e., shell of the egg; 7.t.e., inner tubule everted. 
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