190 Mr. L. Fletcher's Crystallographic Notes. 



The forms (3 2 0), (6 5 0) have not been heretofore described. 



Observed. Calculated. 



o 



010.320 . . 48 ll 48 43 



010.650 .. . 42 24 42 21 



The third crystal presented the combination 



(010) (120) (230) (110) (430) (210) (310) 



(410) (100) (032) (011) (012) (001) (101) 



(201) (232) (111) (212) (412). 



Observed. Calculated. 



010.310 . . 66° 27' 66° 18'. 



A specimen from Moldawa presents some crystals with 

 prism-development ; they are associated with spongy quartz 

 containing disseminated iron pyrites. A crystal having the 

 habit shown in fig. 9 presented the following combination : — - 



(010) (120) (230) (110) (210) (100) (032) 

 (011) (034) (012) (001) (111) (212) (412) 

 (201) (112). 



The planes (0 3 4), (1 1 2) have not been previously observed. 



Observed. Calculated. 



011.034 . . 8° 15' 7° 57' 



The plane (1 1 2), which is somewhat largely developed on 

 this crystal, is that assumed by Naumann and Hessenberg as 

 parametral plane ; it was found to be in the zones [111.001], 

 [10 0.212]. 



Observed. Calculated. 



1 1 2 . 2 1 2 .. 54 20 54 41 



112.111 . . 23 20 24 3i 



112.212 .. 18 12 18 41 



An isolated crystal from Felsobanya, of rich colour and 

 very clear, having the habit shown in fig. 10, was found to 

 present the following combination: — 



(001) (210) (110) (430) (320) (100) (010) 

 (410) (212) (111) (012) (011). 



We have seen above that this form (3 2 0) was also observed 

 on a Solfatara crystal: — 



Observed. Calculated. 



430.320 . . 3° 30' 3° 23'. 



A specimen from one of the Transylvanian localities pre- 

 sents some beautiful crystals, associated with stibnite and 



