Wenbich. — Spermatogenesis of Phrynotettix magnus. 



PLATE 6. 



Fig. 62. — Stages in the transformation of chromosome-pair "A," from 

 pachytene spireme to metaphase of the first spermatocyte. 



Fig. 63. — Similar stages for the chromosome-pair "5," for the equal-type. 



Fig. 64. — Same stages for the pair "5," unequal type. 



Fig. 65. — Similar transformation stages for chromosome-pair "C" 



Fig. 66. — Telophase of an early spermatogonimn, showing members of chro- 

 mosome-pair "A." 



Fig. 67. — Telophase of one of the last spermatogonia, showing members of 

 chromosome-pair "A." 



Figs. 68, 69. — Preleptotene stages, showing persistence of chromosome-pair 

 "A." 



Fig. 70. — Early leptotene. Conjugation of pair "A." 



Fig. 71. — Later leptotene. Conjugation of pair "A." Spireme of the ac- 

 cessory. 



Fig. 72. — Spireme of the accessory. 



Fig. 73. — Zygotene stage, showing conjugation of pair "A." 



Fig, 74. — Zygotene stage, showing conjugation of pair "A" completed. 



