438 



PHOTOREACTIONS OF WHIP-TAIL SCORPIONS 



mals in which parts of the light-sensitive system had been prevented 

 from functioning. Various means of ehminating the lateral and 

 median eyes were considered. There seemed no justification, in the 



Centimeters. 



Fig. 2. Mastigoprodus gigantcus Lucas, /.cheliceras; 2, pedipalps; 3, modified 

 anterior legs which serve as feelers; 4, 5, 6, walking legs; wc, median eyes; le, lat- 

 eral eyt group consisting of three eyelets clustered very close together in the form 

 of a miniature triangle. 



case of an animal in which the eyes could be effectively covered, for 

 such violent methods as extirpation or cauterization with their pos- 

 sible disturbing after-efTects. The following two methods of covering 



