PHYSIOLOGY, CHEMISTRY AKD PATHOLOGY 433 



characters develop only during the maturation of the germ cells; witness 

 the cyclic growth of antlers in the stag, the building of the nest by the 



be 



Fig. 1. Upper drawing shows transplanted ovaries grown attached to the vas 

 deferens. A and C from Dispar, B from Quercifolia; er, oviducts; h, left testicle of a 

 one-sided castrate; vd, vas deferens; ad, accessory male glands; vs, seminal vesicles; 

 dej, ejaculatory ducts. 



Lower drawing shows the sexual apparatus of a castrate female. A from Querci- 

 folia, B and C from Dispar with implanted testicle grown attached to the oviduct; h, 

 testicle; re, regenerated calix; eg and el, egg tubes; dr, gland tubule of the seminal 

 receptacle; rs, seminal receptacle; be, copular bursa; ds, seminal duct; va, vagina; ve, 

 vestibule; kd, cement glands; kdb, container of cement glands. (S. Kopec, Arch. Ent, 

 mech. d. Organ, Berlin, 1911-12, 33, 1-116.) 



