86 SEX 



Sacculina roots, showing that a transference 

 of these materials has occurred, perhaps so 

 rapidly that their presence in the blood cannot 

 be detected. 



Smith's view is in general that the parasite 

 alters the composition of the male's blood to 



FIG. 16. Male era)) Inachus with the sac-like parasite, 

 Sa-cculina (S) protruding between the under surfaces 

 of the abdomen and the cephalothorax. Forceps and 

 abdomen modified towards female type. (After Geoffrey 

 Smith.) 



or towards a female condition, and that this 

 is naturally followed by the development of 

 female secondary characters, or by the regene- 

 ration of an ovary instead of a testis from 

 the indifferent germ-cells that remain at the 

 end of infection. In short he would supple- 



