IIo NEW YORK STATE MUSEUM 
pyramid y (8.8.16.3) are present in relatively small development. Twinning 
parallel to the basal plane 0 (0001) is fairly common [fig. 6]. 
Type VII [pl. 19, fig. 7]. Rhombohedral crystals of this type occur 
on several specimens in milky white individuals of about 20 millimeters 
diameter. They are frequently twinned parallel to the basal plane o (0001) 
and suggest in their development those described under Rossie, Sterlingbush 
and Crown Point. The forms noted are: 
o (0001), a (1120), m. (4041), p. (1011) and 3. (0112). 
The zonal relations of the forms occurring on the seven types are shown on 
the stereographic projection, plate 20. 
SUMMARY OF DISTRIBUTION OF FORMS 
- FIRST GENERATION SECOND GENERATION 
& | NAUMANN | BRAVAIS-MILLER | . | 
e SYMBOL SYMBOL DYPE | TYPE | TYPE | TYPE | IVE | pv eE |r wPE 
I II mee ff IY Vv VI VII 
) oP 0001 ae ae Al x 
a co P2 1120 Ss x x x a 
b oR 1010 5 x xe 
i 1 /P2 8.8.16.3 Ke x cx xe x 
Ss. 13R 13.0; 133. 41 xx page Ape 
m. AR 4041 x x xg xx 
p. R 1011 x Ke x Ke x 
3. —t 0112 x x aK x x 
Q. —2R 0221 x mets 
Ce +3Rt 6178 a x 
k: +R3 2131 5 x 
M: + R41 eA olelegs x aK xR 
Y): +3R22 19.10.29.6 x oc 
6) —R3 1231 pe 
r —6R3 3.5, 19,2 ais x 
