Nos. 451-452.] XERITINA VIRGIXEA. 569 



ing experiments, if it were not for the completely intcr^radini;- 

 forms, systematists would probably have no hesitation in recog- 

 nizing several species. As it is, all must without douht l)c in 

 eluded in one species, and it seems hardly worth while to name 



most divergent types. l"he dwarf torms, however, ini^iit lairlx 

 be called variety minor. 



The writer would suggest that, if the dirfuuUy o| rearin- 

 these anirnals be not too great, it is prol)ahK> that the\ would he 

 favorable subjects for breeding e.\i)eriments. 



The \Vom.\n's College of Baltimore, 

 April 25th, 1904. 



