58 WHAT EVOLUTION IS 



semilunaris. No use is known for this 

 organ in man but in the cat, as one can 

 readily see by direct inspection, in 

 place of this fold there is a nictitating 

 membrane, or third eyelid, which by 

 its free movement back and forth 

 across the eyeball serves as a means 

 of protecting and cleansing that or- 

 gan. The plica semilunaris in man 

 is a completely useless remnant of this 

 third eyelid. 



In an enumeration of the rudimen- 

 tary organs in man made some years 

 ago by Wiedersheim approximately 

 ninety such parts were noted. This 

 seems like a considerable list for one 

 species, but it is probably by no means 

 exhaustive. Most higher animals, like 

 man, abound in a great variety of such 

 useless parts. 



From the standpoint of special 

 creation, it is by no means easy to 

 explain the presence of such function- 



