PLATE 4. 



H 

 I 

 m 



> 



z 

 m 



E 

 O 



r— 

 O 

 Q 

 O 

 > 



> 



o 



> 



H 

 O 

 33 



-< 



> 



-i 



H 

 O 



33 



H 

 C 



> 



o 



o 

 > 



c 

 < 



00 



to 

 o 



4^ 



