236 KATHARINE FOOT AND E. C. STROBELL. 



PLATE II. 

 Euschistus variolarius. 



PHOTO 20. A germinal vesicle a little further developed than the one shown in 

 Photo 18. The delicate chromatic threads are a little more defined. The achromatic 

 nucleolus is present near the periphery. 



PHOTO 21. A germinal vesicle with the delicate chromatic threads well formed. 

 The achromatic nucleolus is seen on the periphery. 



PHOTO 22. A germinal vesicle with the chromosome threads further developed. 

 The nucleolus near periphery. 



PHOTO 23. A germinal vesicle with long, thin chromosome threads. The nucleo- 

 lus on periphery. 



PHOTO 24. A germinal vesicle at about the same stage of development as Photo 

 23 The nucleolus on periphery. 



PHOTO 25. A germinal vesicle with the chromosome threads further developed. 



