1092 The American Naturalist. [December, 
an article on the magnetite of the alps Brugnatelle " describes crystals 
of this mineral from Traversella in Piedmont, Wildkreuzjoch in the 
Pfitschthal and Monte Mulatto and Scalotta in the Fassathal. The 
crystals are remarkable for their wealth of forms, of which f Of , |0|-, 
5O5, 3O, 00 O5, |0| and yOy3^ are new to the species, and the last 
of these new to the system. The plane 30f occurring with O and 
00 O in crystals from Traversella is thought to have been developed 
by etching after the formation of the crystals. Natural etched figures 
on the CO O faces of Rothenkcpf crystals are described in detail. 
Tetrahedrally shaped crystals of stronticenite^^ from the phonolite of the 
Kaiserstuhl are hemimorphic in the direction of their Caxes, and con- 
tain 00 P, 00 P^ and P^. When two or more of these hemimorphic crys- 
tals are twinned they produce forms resembling aragonite twins. — Com- 
plicated crystals oifluorite, with numerous vicinal planes, are mentioned 
by Hintze^^ as associated with the scheelite from Kiessberge in the 
Riesengrund, Germany. General. — In his notes on some minerals 
from the Lizard, Eng., Mr. TealP^ describes briefly some interesting 
ones. A chrome diopside forms with labradorite and olivine a rock 
mass at Coverak, Cornwall. The diopside has a green color when 
viewed microscopically, but is colorless in thin section. It has a 
diallagic parting, an extinction of 40°, and a specific gravity of 3.2. 
Analysis of this, of a pale hornblende from a gabbro-schist at Pen 
Voose, and of malacolite from the gabbro of Karakelews are given. 
SiO^ AIP3 FeA Cr,03 FeO MnO CaO MgO Ign. 
Chromic diopside 49.9 6.2 1.7 .6 3.9 .4 20.4 16.1 .9 
Hornblende 48.8 10.6 1.7 tr 4.7 12.2 18.6 1.8 
Malacolite 52.8 2.8 1.8 25.2 16.6 .5 
AnthophylUte, from a reaction rim between olivine and feldspar at 
the contact of gabbro and serpentine, was separated, and its composi- 
tion was found to be : 
SiO, Al,03 Cr,03 Fe,p3 FeO CaO MgO Na,0 K,0 Ign 
50.8 3.6 tr 2.7 6.8 1.2 26.1 .2 5-8 
A new find of corundum, associated with andalusite, cyanite, chlori- 
toid and mica, is reported by Genth^^ from near Stuart, Patrick Co., 
Va. The rock in which the minerals occur appears to be a garnetifer- 
1* Zeits.f. Kryst., XIV.. p. 237. 
16 Becken kamp. Zeits.f. Kryst., XIV.. p. 67. 
" Zeits.f. Kryst., XIV., p. 74. 
18 Min. Magazine, Oct.. 1888, p. 116. 
'^^Min. Magazine, Oct.. 1888, p. 116. 
