220 E. 8. Dana—Stibite from Tapan. 
Pinacoids é-2 (100, a), é-% (010, 6); prisms 7-3 (310, h), 7-2 (219, n), 7-} (320, 0)*, 
I(110, m), #5 (560, «)*, «-¥ (340, r), 7-3 (230, d), ¢-F (350, J, 4-2 (120, 0), #-F (250, 
x)*, 1-3 (130, g), +4 (140, 4), +5 (150, 2), 6 (160, )*, 7-7 (170, #)*; macrodomes 
4-1 (103, L), 3-7 (203, 2)*, 1-7 (101, 2), 9-7 (901, ©)*; brachydomes 4-% (013, y), 
}-% (012, x), $-% (023, N), 1-% (011, wu), 2-% (021, TL)*, 4-2 (041, Y)*; pyramids 
$ (114, u)*, 3 (227, v)*, 4 (113, s), } (223, o2)*, 1 (111, p), 3 (331, &); macro-pyra- 
mids §-4 (829, ¥)*, 4-4 (413, M); 3-3 (629, o,)*, 1-3 (313, 2.)*; §-3 (523, o1)*, 
yramids 12-10 (9:10°3, Z)*, 4-£ (676, ); 34-4 (45-12, d)*; 9-4 (246, T)*, 
E)*, 5-F (683, o2)*; 48-F (15°25°6, F)*, $-§ (353, 7); 9-2 (123, ¢), 4-2 (243, o4)*, 
2-2 (121, 0), 49-3 (5°10°3, we), 6-2 (361, A); AATF (6113, w,)*; 1-F (265, H)*, 
§- (253, o5)*, 2-3 (263, o6)*; 3-3 (10°30°9, V)*, 1.5 (273, o7)*; 3-4 (146, »), 
1-4 (144, G)*, 8-4 (283, o,)*, 4-6 (2°12°3, 04)*. 
The above list includes 70 planes, of which 40 are new to 
the species. In addition to the above there have been observed 
15 additional planes, as given below; of these the basal plane, 
given by Haiiy, must be considered as doubtful; Hessenberg 
gives the planes w and p, Seligmann observed g, and the 
remainder are given by Krenner. 
© (001, ¢)?; © (430, K); }-7 (106, R), 4-1 (102, y); 4-4 (043, Q), §-£ (053, J), 
3-% (031, J), 3-4 (092, 9); + (112, =); 3-2 (214, J); 1-4 (434, a); 1-7 (878, e 
3-3 (131, w); 4-4 (143, 9); $-5 (153, p). 
(170) 8° 21’, required 8° 113’. The new macrodomes were de 
termined by angles measured on the macropinacoid a (100), as 
follows: for ¥ (208) 55° 40’, required 55° 384’; for @ (901) 
6° 20’, required 6° 11’. The new brachydomes were determined 
by angles measured on the brachypinacoid } (010), as follows: 
for 11(021) 26° 20’, required 26° 9%’; for Y (041) 14°, required 
13° 48’, In the zone of the unit pyramids three new Pia 
were observed: yw (114) determined by the angle on (110) 
=70° 17’, required 70° 8’; »(227) also in the zone with x (012) 
and S (203); and a, (223) also in the zone with 208 and 010. 
In the zone between 203 and 010 as many as 10 pyraml 
planes were observed, all but one on a single crys and 0 
these 9 are new. The measured angles on 2 (203) were for 
©, (629) 10° 30’, for o, (223) 29° 30’, for a, (238) 40°, for % 
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