248 MINERALOGY. 



Kokscharow, N. von. [Biotite.] N. Jalirh. Heft viii. pp. 857, 858. 



Maintains, on crystallographic grounds, that the Vesuvian magnesia- 

 mica (biotite) is truly hexagonal, notwithstanding optical reasons for a 

 different conclusion. E. W. E. 



Krenner, Dr. Josef Alex. Wolframit aus dem Trachyte von Pelso- 

 Biinya. [Wolframite from the Felsobanya Trachyte.] Min.Mitt. 

 pp. 9-12, with plate. 



A crystallographic description of wolframite from a much decom- 

 posed trachyte. Its occurrence in so new a rock is notable, as it has 

 been supposed that this species was confined to the oldest rocks, where 

 it occurs in association with tin-ore ; no tin- has yet been found in 

 Hungary. 12 forms are described as occurring in the Eelsobanya 

 wolframite, of which 6 are new. The fundamental prism (1 1 0) has 

 not been observed, but is replaced by the prism (3 1 0). F. W. E. 



Laguerenne, Teodoro. Apuntes sobre el Mineral de San Nicolas del 

 Ore. [Notes on the Ore of S. Nicolas del Oro.] Naturalcza^ t. iii. 

 ' no. 9, pp. 167-171. 



Lasaulx, Dr. A. von. Mineralogisch-krystallographische Notizen. 



[Mineralogical and Crystallographic Notices.] N. Jahrh. Heft ii. 



pp. 128-151, with plate of crystals. [Notice 4 translated in Boll. 



R. Com. Geol. Ital. pp. 106-111.] 

 Describes : — 1 . A new fossil resin from the lignite of the Ehine valley, 

 to be called from its locality Sieghurgite ; 2. The occurrence at Striegau 

 of fluorspar, in the triakis-octahedron 40, which had not been 

 previously observed as an independent form ; 3. Crystals of the double 

 chloride of sodium and iridium, and of the chloride of sodium and 

 rhodium ; 4. New occurrence of alunite near Breuil in the Auvergne ; 

 5. Albite from Guatemala ; and 6. Garnet from Geyer in Saxony, which 

 exhibits combination of tetrakis-hexadedra ooO|- and oo02. E. W. E. 



Mineralogical Notes.] N. Jahrh. Heft vi. pp. 629-633. 



Notes referring to crystals of scorodite from Dernbach, near Montabaur; 

 to amazon-stone from the granite of Konigshayn, near Gorlitz ; to 

 minerals resembling monazite and gadolonite from the Eiesengebirge ; 

 to the occurrence of magnesite at Baumgarten, near Frankenstein ; to 

 the basalt of Landeck in Glatz ; and to crystals of quartz from Lizzo in 

 Italy. P. W. E. 



Laspeyres, H. Krystallographische Bemerkungen zum Gyps. [Crys- 

 tallographic Eemarks on Gypsum.] Min. Mitt. Heft iii. pp. 113- 

 130, with plate and 2 woodcuts. 

 Description of twin-crystals of gypsum from Eichstadt, near Merse- 

 burg ; of crystals of this species from the Papelsberg in the Siebenge- 

 birge; and of twin-crystals of the same species from Eisleben. The 

 last-named crystals exhibit the following new forms : —fPf and 

 --|Pgo . The flexibility and cleavage are also noticed. E. W. E. 



