448 



F. A. rOTTS, 



The experiments of Mm upas with Jlhaljclitis ele<rans 

 showed that on the raie occasions when males do fertilise 

 liermaphrodities, the spermatozoa are perfectly efficacious in 

 the production of emhrj^os. Tiie curious change in the sex- 

 proportions of the offspring of such unions may, however, be 



Tkxt-fig. 4. 



eventually traced back to some essential difference in the 

 spermatozoa of males and hermaphrodites respectively, which 

 niio-ht be revealed by a thorouo-li examination of the spermato- 

 erenesis in the two cases. 



But though there is no manifest imperfection of organisa- 

 tion in the males of hermaphrodite species, they appear to be 



