132 



CATHARINE LINES CHAPIN. 



have the usual arrangement about a collecting duct. The cells, 

 showing no signs of division to form cysts, which is the im- 

 mediate preparation for spermatogenesis, are not as far advanced 

 in their development as the germ cells of a normal male larva 

 several months younger than the hermaphroditic one. The left 

 gonad shows throughout a retarded development. 



The right gonad, on the other hand, although smaller than 

 the normal testis of an individual of the same size, seems to 







FIG. 2. Horizontal section through posterior region of left gonad of hermaphro- 

 dite, X 280. / = follicle cell, o = oogonium, ov = ovum, p = peritoneum. 



be, in general, normal in structure and in its cellular development. 

 However, it shows another sort of hermaphroditism. Two ova 

 are, in this case, found in the otherwise apparently normal 

 testis, each one completely filling one lobule, which would nor- 

 mally contain a large number of male cells (see Fig. 3). These 

 ova are about two thirds the size of those found in the right 

 gonad. All the lobules are divided into cysts, with the excep- 



