76 NEW YORK STATE MUSEUM 
by the negative rhombohedron %.(0112); the lateral angles of the scaleno- 
hedron are truncated by the prism b (1010). 
The combination shown in figure 5 has for its dominant form the posi- 
tive scalenohedron K:(2131) terminated by the rhombohedrons p. (1011), 
and 8.(0112) and the positive scalenohedron c:(6178) all of which lie in 
the zone [0112.1120) and the two latter of which are deeply striated parallel 
to the zone. The lateral angles of K: are modified in the negative sextants 
by the planes of g: (6.7.13.2) in fair development. 
Type V [fig. 6, 7]. The crystals of this type are found lining the 
interior of pockets 1n massive red hematite and incrusting a thin layer of 
specular hematite which latter appears to be of secondary derivation from 
the main body of the ore. They average 4 millimeters in vertical length 
and do not show in any instance a double termination. In habit the crys- 
tals of this type vary slightly from a distinctly scalenohedral phase [fig. 6] 
to a rhombohedral-scalenohedral variation [fig. 7]. The dominant scaleno- 
hedron K:(2131) is always present, represented by smooth, bright planes. 
In the rhombohedral zone, the prism b (1010) and the positive rhombohedron 
m. (4041): are dominant, specially in the variation represented in figure 7. 
On the crystals of this variation the new negative scalenohedron e(1.11.12.2) 
was noted. This scalenohedron is present as a series of minute faces, which, 
however, gave fair reflections and corresponded well with theoretical 
values for the measured angles. The crystals of the combination repre- 
sented in figure 6 show, as well as the negative rhombohedron 34. (0112), 
common to the type, the negative rhombohedrons 7. (0445), 9. (0221) and 
©, (0.14.14.1) all of which latter are developed as subsidiary modifications. 
SUMMARY OF | DISTRIBUTION OF FORMS 
| NAUMANN | BRAVAIS-MILLER | TYPE | TYPE | TYPE TYPE | TYPE 
eS Ee eo 7 SYMBOL Lecce tan Il | iw oh Ap 
a eo P2 1120 en xe Sg eee| | 
b oR 1010 x xe x Bae | ea 
0 10P2 5.5.10.1 Nie os tame: 
9 16P2 8.8.16.1 [eee RON SOP ae Mrs oF) OGY 
S. 13R 13.0. 03, 1 A Sallohs ce, | Se ce ave ee 9 | 
