528 General Notes. 
New Mrinerats.—Caracolite from pga Chili, has lately 
_ been described by Sandberger' as a new mineral. It is intimately 
associated with percylite, and like this latter j is regarded as derived 
from galena by alteration. Caracolite occurs in transparent crys- 
tals with a hexagonal habit; produced by trillings of rhombic 
individuals neat T to the ‘aragonite aw e axial ratio is: 
a: 84 4213. Its specific gravity is 5.1. Its 
analysis yielded le corresponding to the formula Pb (OH) Cl 
+ Na, SO, The associated percylite was also analyzed and found 
to janie: to Pb (OH) Cl + Cu (OH) Cl.—Mursinskite? has 
en found only in two small yellow translucent crystals at the 
topaz locality at Mursinsk, near Alabaschka, in the province of 
ee Russia. The c rystals are Heanor ee an axial 
ratio, a: c = 1: 0.5664. They are bounded by P; 2P%,  P®, 
and various ditetragonal pyramids. Their composition is ee 
—Bementite is a radially fibrous mineral not unlike pyrophyllite in 
appearance, which occurs at Franklin, N. J. Its color is grayish 
pata and its Te gravity 2.981. Its composition as descri 
rof. König” i 
Si O, Mn O Feo Zn O Mg O H; O 
39.00 42.12 3.75 2.86 3.83 8.44. 
corresponding very nearly to (H, Mn), Si O,—Martinite is a new 
. calcium phosphate from the Island Curacoa, i in the West Indies. 
Tt occurs, according to Kloos,* only in pseudomorphs after gypsum. 
Under the microscope it is seen to consist of an aggregate of little 
thombohedra. Its specific gravity is 2.892 to 2.896. Its analysis 
yielded :— 
P; O; Ca O H,O Org. subs. Insol. 
47.77 47.20 4.52 75 -20 
—Arseniopleite is a reddish brown substance associated with rhod- 
onite and hausmannite in veins in a crystalline limestone at the Sj6 
mine, Gryhyttan, Province of Oerebro, Sweden. Its analysis 
yielded Igelstrém° :— 
As,O; MnO Feo, PbO CaO MgO PS 
44.98 28.25 3.68 4.48 8.1) 3.10 5.67 
—Barysilite® is a lead silicate (3Pb O. 2Si O,) from the Harstig iron 
mine at Pajsberg, Sweden. Its color is white, ee hex- 
onal, hardness about 3, and its specific gravity 6.11 to 6.55.— 
Caleiothorite, Melanocerite and Rosenbuschite are silicates of the rare 
1 Neues Jahrb. f. Min., etc., 1887, ii., p. 75, and Websky: Sitzb. Ak. 
Wissensch Berlin, Nov., 1886. torib 
2 Kokscharow: Bull. d. l'Acad. Imp. des Sciences d. St. Peters). 
1887, p 
„4: 
krua. Acad. Nat. Se. Phila. ., Oct., 1887, p 
‘Sammlg. d. Geol. Reichsmus, Leiden. Ber ii, Bd. i. Ref. Neues 
u C. . i., p. 39 
§ Sjögren and Loni. Oefv. Vet. Ak. Förh., 1888, xlv., p. 7- 
