108 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



large crystals from Guanaxuato, Mexico ; fiuor, fine groups of 

 crystals of various colours, from Gersdorf in Saxony, Kongsberg 

 in Norway, and Cornwall; haematite, a fan-like group of large 

 platy crystals from Brazil ; chrysoberyl, a magnificent group 

 of large crystals of the alexandrite variety, from Takovaya, 

 Urals, and a number of small isolated crystals from Ceylon ; 

 cassiterites from Cornwall and Bohemia ; zircon from Lake 

 Ilmen, Urals, and Fredriksvarn, Norway ; quartz of different 

 varieties from several localities ; precious opal in matrix and 

 wax-opal from Hungary, green opal from Ceylon ; aragonite, 

 twinned crystals from Aragon and Bohemia, and coralloidal 

 from Sicily ; cerussite, a large twinned crystal from Nerchinsk, 

 Siberia, and bright green crystals from Leadhills, Lanarkshire ; 

 calamine, apple-green crystals from Chessy, France, and 

 pseudomorphous after calcite from Derbyshire and Mendip 

 Hills; calcite, a large violet twinned cleavage rhombohedron 

 from the Harz, translucent botryoidal group from Dauphine, 

 France, and various other forms; pseudogaylussite, groups of 

 pseudo-crystals brought up in the fishermen's nets in Lake 

 Onega, Russia ; aurichalcite on fiuor from Rutland mine, 

 Matlock, Derbyshire ; chessylite, ciystals partly altered to 

 malachite, from Chessy, France ; malachite, fibrous and con- 

 cretionary, from Siberia; olivine, a large and unique crystal, 

 transparent and of a rich green colour, probably from the 

 Island of St. John, Red Sea, and granular aggregates from 

 the Isle of Bourbon ; chondrodite in crystalline limestone 

 from Amity, New York ; diopside from Maneetsok, Greenland ; 

 topaz, 13 fine crystals and groups from Brazil, Siberia, and 

 Saxony, one yellow crystal from Brazil, being 23 cm. in length, 

 and another, more perfect and of a rich clear orange-red colour, 

 10 cm. in length ; beryl, a clear emerald in mica-schist from 

 Takovaya, Urals, a large etched aquamarine of unknown 

 locality, a deeply etched blue crystal from Mourne Mtns., Co. 

 Down, and a pale green crystal from Kangayam, Madras ; 

 euclase, a clear green crystal 3* 5 cm. in length from Brazil, 

 and a pale-blue faceted stone ; chrysocoUa pseudomorphous 

 after atacamite from Bogoslovsk, Urals ; staurolite, a large 

 twinned crystal from Baud, Brittany ; spessartite from 

 Haddam, Connecticut ; hessonite, isolated crystals from Ceylon ; 

 grossular on serpentine from Novara, Piedmont ; almandine 

 crystal from India ; ilvaite, two groups of large crystals from 

 Elba ; orthoclase, a sharply-developed Baveno-twin from 

 Baveno, Piedmont, a large Carlsbad-twin from the Urals, a 

 large simple crystal of adularia from St. Gotthard, and a 

 polished slab of the moonstone variety from Sungangarsok, 

 Greenland ; labradorite, a thin slice of a porphyritic crystal in 

 matrix, showing brilliant colours ; tourmaline, pink crystals 

 on granite from Elba ; axinite, fine groups and isolated crystals 

 from Bourg d'Oisans, Isere, France ; sphene, a large rough 

 crystal 13 cm. long from Arendal, Norway, a perfectly 

 developed isolated crystal from Grisons, and a group of twinned 

 crystals with apatite from Val Maggia, Ticino ; columbite, an 

 isolated crystal from Bodenmais, Bavaria ; wulfenite from 



