PLATE 5 



EXPLANATION OF FIGURES 



(Acridium granulatus) 



34, 35, 36 Polar views of the same stages as figures 29 to 3f . Tlie chromo- 

 somes differ in diameter. 



37, 38 Second-spermatocyte metaphases, polar views, one containing and 

 one lacking the sex chromosome (2x). 



39 Intestinal epithelium, mesenteron. The no. 5's are relatively smaller 

 here. 



40 Intestinal epithelium, mesenteron. 



41 From proctodeal region of intestine, near base of the epithelium. 



288 



