CERUSSITE CRYSTALS FROM BROKEN HILL AND MULDIVA. 



305 



evidently twinned to I, and its position lends support to 

 Goldschmidt's contention. 



Group X (Plate LIII, fig. 4, Text Fig. 6).— This group, 

 which is about 3i cm. in greatest diameter, was attached 

 to a limonitous matrix ; in general appearance it resembles 

 Groups VII, VIII, IX. The forms identified are c (001), 

 b (010), m (110), x (012), fc (011), i (021), v (031), y (102), 

 p (111), o (112), s (121); in addition a face which may belong 

 to q (023) was observed once (p meas. 25° 48', calc. 25° 44). 

 A possible new dome (059) gave a single measurement 

 (p meas. 22° 0', calc. 21° 53'), but it requires confirmation. 



*m* 



Fig. 6. 



Segment. 



v 



Limits. 



Number of 

 Observations. 



<£o 



I 



116° 3 



116° 7 - 116° 25 



10 



O 1 







II 



121 37 



121 28 - 121 44 



8 



5 24 



III 



176 3 



176 1-176 5 



3 



59 50 



IV 



184 18 



184 11 - 184 24 



8 



68 5 



V 



238 46 



238 41 - 238 54 



11 



122 33 



VI 



241 35 



241 32 - 241 37 



4 



125 22 



VII 



170 30 



170 29 t 170 30 



2 



54 17 



VIII 



178 56 



178 48 - 179 6 



12 



62 43 



IX 



233 15 



233 3 - 233 27 



11 



117 2 



X 



236 2 



236 1-236 2 



2 



119 49 



XI 



247 12 



247 9 - 247 16 



2 



130 59 



T— November 3, 1915. 



