544 SCIENTIFIC RECORD FOR 188-2. 



and the chemical formula is analogous to that of miargyrite with bis- 

 muth in the place of antimony. It is described by Konig as occur- 

 ring intimately mixed with barite, chalcopyrite and tetrahedrite at the 

 Alaska mine, Poughkeepsie Gulch, Colorado. Silbericumrtthglanz is a 

 name given by Kammelsberg to a closely related mineral from Moro- 

 cocha, Peru; it contains only sulphur, bismuth, and silver. 



Annerodite. — A mineral occurring in prismatic crystals closely re- 

 sembling columbite in habit and in angles. It has a black color and 

 submetallic luster. In composition it is very near samarskite, and the 

 describer, Brogger, regards it as bearing the same relation to columbite 

 which samarskite bears to tantalite, found in a pegmatite vein at Aune- 

 rod, near Moss, IS^orway. 



Arcfolite. —A mineral of doubtful character, only interesting because 

 of its source, Hvitholm near Spitzbergen. The name indicates that it 

 comes from the Arctic. It has the prismatic angle of the amphibole, 

 while in composition it appears to be near prehnite. The describer is 

 Professor Blomstrand of Lund^ Sweden. 



Balvraidite. — A name given by Heddle to a supposed homogeneous 

 substance, having a saccharoidal structure and pale purplish-brown 

 color, which was found in the granular limestone of Balvraid, Inverness- 

 shire, Scotland. An analysis makes it a hydrous silicate containing alu- 

 mina, iron sesquioxide, lime, magnesia, and alkalies. It has not yet been 

 shown to be a distinct mineral. 



Beegerite. — Occurs in elongated isometric crystals, also massive, 

 with a brilliant metallic luster and gray color. In comj^osition it is a 

 sulpho-bismuthite of lead. It is described by Konig as occurring at 

 the Baltic Lode, near Grant P. O., Park County, Colorado, and is 

 named for Mr. Hermann Beeger of Denver. 



BergamasMte. — A variety of amphibole remarkable because contain- 

 ing almost no magnesia. It is described by Lucchetti as occurring in 

 quartzose hornblende porphyry at Monte Altino, province of Bergamo, 

 Italy. 



Berlauite. — A name given by Schrauf to a chloritic substance fllliug 

 cavities between granite and serpentine, found in the serpentine region 

 near Budweis, Southern Bohemia. It is near other members of the 

 vermiculite group, but has not yet been shown to be a distinct min- 

 eral. 



Bracl-chtischite. — A hydrous vanadate of lead, containing small 

 amounts of iron, manganese, and copper; related to descloizite. It 

 occurs in small prismatic crystals of a black color, with other vana- 

 dium minerals in the State of Cordoba, Argentine Republic. Named 

 by Doring after Dr. Brackebusch of Buenos Ayres. 



Bunsenin. — See below under krennerite. 



Chajlcomenite. — Occurs in bright blue monoclinic crystals, and 

 crystalline crusts. In composition it is a hydrous selenite of copper. 

 The describers, Des Cloizeaux and Damour, speak of it as found with 



