431] STUDIES ON GREG ARINES— WATSON 221 



EXPLANATIONS OF PLATES 



All original drawings were made with the camera lucida directly 

 from the live material and the magnification of each is given. 



All the drawings which were copied from other authors were drawn 

 by means of the camera lucida and the source of each drawing is given 

 in the explanation of the individual plates. No magnifications are men- 

 tioned in the majority of the original sources and hence none can be 

 given here. 



