MINERALOGY. 543 



locality, at Paris, has been reopened and has offered some more good 

 specimeus. 



The many minerals occurring in the diabase dike at Deerfield, Mass., 

 have been exhaustively studied and described by Emerson. 



Middletown, Conn., has afforded at Pelton's quarry a few specimens 

 of monazite and samarskite. 



De Kalb, N. Y., has yielded interesting crystals of white tourmaline. 



In Canada the locality at Egauville, Kenfrew County, Ontario, has 

 continued to yield tine specimens; among these are gigantic crystals of 

 apatite and titanite, also large twin crystals of zircon, which are unique 

 for the species. From Hull, Quebec, fine colorless garnets have been 

 obtained. Samarskite has been found in the township of Brassard, 

 Berthier County, Quebec. Lazulite has been analyzed by Hoffmann 

 from Churchill River, Keewatin district. 



In regard to new mineral discoveries outside of the United States 

 and Canada, it is unnecessary to speak in detail. Attention may be 

 called to the discovery of vanadates, valYadinite, descloizite, &c., in the 

 Argentine Eepublic ; to the description by Silliman of a mountain of 

 martite, the Cerro de Mercado of Mexico. The ancient mines recently 

 reopened at Laurium, Greece, have afforded, besides the commoner zinc 

 species, also adamite, cabrerite, and several new species mentioned 

 later. 



The rare mineral danburite, long known only in imperfect imbedded 

 crystals from Danbury, Conn., afterward (1880) found in large and fine 

 crystals, often transparent, at Eussell, N. Y., has now been discovered 

 on the Skopi, Switzerland. The discovery of this borosilicate is worthy 

 of note; the crystals are small, quite clear, and have the same remark- 

 able resemblance to topaz characteristic of the crystals from Eussell; 

 the composition is identical with that of the American mineral. The 

 hydrous carbonate of alumina, called dawsonite by Harrington, from 

 specimens found at Montreal, has been identified in Tuscany. A re- 

 markable variety of tourmaline containing chromium has been described 

 from the Urals. Euclase and phenacite have been obtained from the 

 Alps. Beautiful blue opals are now brought from Queensland ; their 

 occurrence has been described by Robertson in the Proceedings of the 

 Philosophical Society of Glasgow for 1881-82. 



5. NEW MINERALS. 



The following pages contain brief descriptions of the minerals an- 

 nounced as new, during the past two years. Only a small portion of 

 these have characters sufficiently distinct to justify their being accepted 

 as true new species. The list is arranged in alphabetical order, and the 

 names of the most clearly defined species are printed in small capitals, 

 the others italics. 



Alaskaite. — A massive mineral with metallic luster and whitish 

 lead-gray color. It contains sulphur, bismuth, lead, silver, and copper j 



