360 INEZ WHIPPLE WILDER AND ELIZABETH BARRETT PEABODY. 



nit 



B 



r- , 



^^^-^^"''"- 4k 



;. - *lN8S$ 



' 



0! w^V' 



,,,,/:; 



.i-4?ii|i?P|^:' : 1 



. : 



ti; 



^ <Ss.S^#f! ;itft-'- 

 ||*gfSi : ";'|i,'\ : ^ 



FIG. 6. Cross sections, at the levels indicated in Figure 5 by the lines 12, 

 showing (A) the right gonad of an incipient metamorphic male; (B) the 

 right gonad of an advanced metamorphic hermaphrodite; (C) the left gonad 

 of the same individual ; and (D) the right gonad of a premetamorphic fe- 

 male (X 365). Cc, central cavity of ovary; cd, collecting duct of the testis 

 and testicular region of the hermaphroditic gonad ; d, degenerating cells ; f, 

 follicles ; mt, spermatogonial mitoses ; o, ova (primary oocytes) ; p, peritoneal 

 investment; pi, polymorphonuclear germ cells (primary spermatogonia) ; //, 

 testicular lobule ; tp, testicular pigmentation ; yo, young primary oocytes. 



