24 



FEMALE BITTERLING 



/. Androstanol' I y -trans-one-^ (trans-dihydro-testoster- 

 one). With concentrations of >^, >^ and i mg per 750 ml 

 water the following growth-curves were obtained (Fig. 28). 

 The characteristics of these curves are:— 



Latent period, i hour. Growth continues after 12 hours. 



j. Andtostane-^-cis, 17-frans-cf/o/. With concentrations of 

 y&, Ya, /4 and I mg per 750 ml water the following 

 growth-curves were obtained (Fig. 29). The characteristics 

 of these curves are:— 



Latent period, i hour. Growth ceases after 10 hours. 



k. I j-methyltestosterone. With concentrations of >4» ^ 

 and I mg per 750 ml water the following growth-curves 

 were obtained (Fig. 30). The characteristics of these curves 

 are:— 



Latent period, i hour. Growth ceases after 10 hours. 



A.a 



Fig. 30. Ovipositor growth curves after administration of 

 methyl-testosterone. 



/. Testosterone- propionate. With concentrations of }i, 

 Yz, I and 2 mg per 750 ml water the following growth- 

 curves were obtained (Fig. 31), The characteristics of these 

 curves are:— 



Latent period, i hour. This curve does not show the 

 "crack" after 5J/2 hours, typical of male hormones. Growth 

 ceases after 5 Yz hours. 



