538 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 51). 



Zone No. 20 b. — Negative vertical pyramid zone. 

 (001) : (120). Symbol—. 



Form... 



Svmbol. 

 N 3 



123 

 2/3 

 2 '3 



120 



The zone is normal with only one form missing and one extra. The 

 extra form is 361 which is here described as new. 



Zone No. 22. — Diagonal zone. 

 (120) : (011) : (102) : (120). Symboly. 



i' orm . . . 

 Symbol . 



120 



Dividing at 1 



V 



2v 1/2 2/3 1 



N 3 0*1/2 2/3 1 



1/5 1/4 1/3 1/2 5/6 1 



1/4 1/3 1/2 1 5 co 



2 10 co 

 I 2 3 co 



The zone is normal except for the form 546 which does not fit in. 



Zone No. 23. — Vertical zone, 

 k 



(140) : (001) : (140). Symbol 



Form. .. 



Symbol. 

 N t 



e 



140 



001 I. 4. 10 



| 2/5 

 0i | 2/5 



148 

 1/2 



t 



143 

 4/3 

 4/3 



.1 



112 



2 



, .2 . 



T 1 V 



3 i 



e 



140 



This zone is normal though incomplete. 



