€^eologij, S^c. of the Connecticut. 235 



crystals are so grouped that it is difficult, in the specimens 

 which I saw, to seize upon the precise form. I think, how- 

 ever, I found the octaedron with truncated pyramids. Also 

 at Leverett, foliated. 



99. Arsenical Nickel. At Chatham, associated with ar- 

 senical cobalt. (Pierce and Torrey.) 



100. j^rsenical Cobalt. At Chatham. (Silliman.) 



101. Arseniate of Cobalt. At Chatham. (Pierce and 

 Torrey.) 



102. Oxide of Manganese. At Leverett, in alluvial soil 

 forminii; a bed five or six inches thick a iew inches below 

 the surface. It is in rounded irregular masses from ihe size 

 of a pea to an inch in diameter and considerably resem- 

 bles granular oxide of Iron. Also at Deerfield ; forming 

 crusts on quartz and mica slate. 



103. Native Bismuth. At Huntington. (Silliman.) 



104. Native Antimony. At Harwinton, Litchfield coun- 

 ty, in broad plates. (Silliman.) 



105. Sulphuret of Antimony. At Harwinton.* (Silli- 

 man.) Also near South Hadley. (Gibbs.) 



106. Native Tellurium,. At Huntington, associated with 

 tungsten, bismuth, silver, &;c. (Silliman.) 



107. Sulphuret of Molybdena. At Saybrook. (T. D. 

 Porter.) Alsoat East-Haddam and Shutesbury. (Silliman.) 

 Also at Brimfield. (Eaton.) 



108- Yellow Oxide of Tungsten. A new species discov- 

 ered, analyzed and described by Professor Silliman. At 

 Huntington inagangue of quartz. 



109. Calcareous Oxide of Tungsten. At Huntington. 

 (Silliman.) 



110. Ferruginous Oxide of Tungsten. At Huntington. 

 (Silliman.) 



* 104 and 105 need confirmation, — Editor. 



