( exli ) 



ative of their species. When I have spoken of the scent- 

 scales as absent, it may simply be that I have been unable to 

 find them ; when they have appeared to be scanty, it may be 

 that the particular specimen examined has happened to have 

 lost them ; and other sources of error may very easily exist. 

 Nevertheless, I may be permitted to feel with some degree of 

 confidence that much of what I have put before you is both 

 new and true, and that a path of lesearch has been opened 

 which may be followed vip with good hope of both interesting 

 and valuable results. 



