154 Scientific Intelligence. 



ture. In the neighborhood of the gneisses the rocks exhibit a 

 peculiar cataclastic structure and are here only, gneissoid. They 

 are shown to have an enormous geographical extension — in the 

 Saguenay region the anorthosite extends over 5,000 square miles. 

 It is concluded that these rocks were intruded around the shore 

 lines of the ancient Archaean continent in pre-Cambrian times 

 as modern volcanoes fringe the great oceanic areas. — N. Jahrb. 

 Min., B. B., viii, pp. 419-498. l. v. p. 



3. Brief notices of some recently described Minerals. — Sundtite 

 is a sulph-antimonate of silver and iron described by W. C. 

 Brogger from the silver mines of Oruro, Bolivia. It occurs in 

 complex orthorhombic crystals and in massive forms. It shows 

 no distinct cleavage, is very brittle and has a conchoidal fracture. 

 Other characters are: hardness 3-4; specific gravity 5*50; luster 

 metallic ; color steel-gray. An analysis by G. Thesen gave 



S Sb Ag Cu Fe 



35*89 45*03 11-81 1*49 6'58=100*80 



This leads to the formula (Ag 2 , Fe)S.Sb 2 S 5 . The species is 

 named after the mining director, L. Sundt. — Zeitschr. Kryst., xxi, 

 193, 1893. 



Marshite is native copper iodide described by C. W. Marsh 

 from Broken Hill, New South Wales, and named after the de- 

 scriber by Prof. Liversidge. It occurs in very minute crystals 

 implanted on a gossan-like siliceous cerussite. The crystals are 

 referred to the hemihedral division of the tetragonal system. 

 They are brittle ; fracture subconchoidal ; luster resinous ; color 

 reddish oil-brown ; streak orange-yellow ; transparent. The 

 qualitative blowpipe and chemical characters fix the composition 

 as iodide of copper, but a fuller examination of this and associated 

 minerals is promised. — Proc. Roy. Soc. JSf. 8. W., xxvi, 326, 

 1892. 



Burmite is a new fossil resin from Upper Burma, described by 

 Dr. Fritz Noetling in the Records of the Geological Survey of 

 India, vol. xxvi, Part 1, 1893. 



4. Zoisite from, the Flat Rock mine, Mitchell Co., JVort/i 

 Carolina ; by W. E. Hidden. (Communicated.) — A pink, vitreous 

 mineral, which 1 found entirely surrounding a large ovoid mass of 

 very pure monazite, associated with a black, glassy allanite, has 

 proved to be zoisite. The rare association made an analysis seem 

 desirable, and this has been obtained through the kindness of 

 Mr. L. G. Eakins of the U. S. Geological Survey. Mr. Eakins's 

 analysis gave : 



Si0 2 A1 2 3 Fe 2 3 MnO CaO H 2 



38 98 31-02 4-15 0-23 23'80 2-03 = 100-21 



Sp. gravity 3*352 at 27° C. The water is strongly combined, 

 not beginning to go off until a red heat is reached. 



5. Optical examination of Cacoxenite; by Lea. McI. Luquer. 

 (Communicated). — The examination was made with a Beck litho- 

 logical microscope, upon specimens from the following localities : 



