4 The Unity of the Organism 



(a) Illustrated hy the Ontogeny of Mammalian Sperm 



Without exception, so far as I know, positive description 

 of spermatogenesis affirms that the tail is produced from 



h-c, 



vi-:SS»i>;:i 



■CI TX, 



ra.p. 



FIGURE 36. SPERM OF FUR SEAL ( AFTER OTJ^^ER). 



h.c, head cap. n'k., neck, c.p., connecting piece, c.r., cytoplasmic 

 remnant, g.a., anterior granules. g-P-> posterior granules, an., 

 annulus. m.p., main piece, e.p., end piece. 



other parts of the spermatid than the nucleus. For the lit- 

 tle we can do in the way of giving objectivity to this general 

 statement we will first examine the nearly mature, typical 



