736 General Notes. 
nitrates of barium, strontium and lead crystallize in the pentagonal- 
tetrahedral division of the regular system. Analogous results’ 
follow from a discussion of the possible kinds of letartohedrism in 
the other systems.—Scharizer? describes honey-yellow to greenish 
xenomite crystals from a pegmatite vein near Schiittenhofen, Bohe- 
mia. The most prominent type is that produced by the combina- 
tion of the prisms and pyramid with the ditetragonal pyramid, 
though ricinal planes obscure to some extent the tetragonal symme- 
try of the mineral. The axial relation is 1 : .62596. In a second 
type the prismatic faces are wanting.—Wine-yellow crystals of 
barite from the phenolite of Oberschaffhausen, in the Kaiserstuhl, 
ave been examined by Beckenkamp.* Three types are recognized. 
The first is characterized the large development of the prismatic 
and basal planes, while the second type contains in addition the 
brachydomes. The third type contains the latter faces developed 
to the almost complete exclusion of the prismatic faces. The axial 
ratio of the crystals is 8151: 1: 1.3019. They are pleochroic ın 
yellow and white tints——Cathrein* has found in the adularia from 
Schwarzenstein, Zillerthal the prismatic faces œ P$, œt$ an 
æ P7, the orthodomes $P% and —280P œ, and the orthopyramid 
21P9, all of which are new to orthoclase.—Crystals of chalcopyrite 
from Holzheim, in Nassau, are interesting in that they contain the 
scalenohedron modified only by the very small planes and 2P gp. 
1 Ib., xiii., 1888, p. 474. 
# iD., xiii., 1887, p: 15. 
3 Zeitschrift, f. rt xiii., 1887, p. 25 and p. 386. 
* Ib., xiii., 1887, p. 332. 
5H. Mayer. Ib., xiii., 1887, p. 47. 
