WHITLOCK. — CRYSTAL FORMS OF CALCTTE. 329 



normal series N 5 marks the intersection of the zones [0221 : 10 • • TO • 1], 

 [4047 : 1780] and [1342 : 0772]. It is very probable. 



fi (3582) = (13-4-I1). This scalenohedron was noted by Flink 101 

 on crystals from Narsarsuk, southern Greenland. In spite of the high 

 normal series to which this form is referable, it presents excellent 

 zonal relations and should be regarded as fairly probable. 



Zone 10 = Zi . — Scalenohedrons of the Zone [0551 : 10 -0 • 10 • 1]. 



This zone contains only one scalenohedron which has not already 

 been discussed in the preceding analysis, namely: X • (16 -7- 23 -3) = 

 (14-2-9). This scalenohedron was observed by Eakle on a series of 

 crystals from the cinnabar mine at Terlingua, Texas. The form was 

 noted on all the crystals studied and although developed as slightly 

 rounded planes gave good agreement between measured and calcu- 

 lated angles. Moreover the form marks the intersection of the zones 

 [11 -0-TT-T : 3251] and [1123 : 2131] all four of which forms are present 

 On the combination. The form is well established. 



Zone 11 = Z n . — Scalenohedrons of the Zone [5052:0551] = 



[114 : 223]. Symbol V 



In this portion of the zone [5052 : 0551 : 1120] the most prominent 

 pole is (2131) = (201^ Splitting at this point and considering the 

 fragment between (201) and (223) in as much as no forms have been 

 recorded between (114) and (20T), we have for the forms recorded: 



101 Flink, G., Medd. om Gronl., 24 (1899). 



