1888. | NEW YORK ACADEMY OF SCIENCES. 217 
CLASSIFIED LIST. 
(Arranged according to Dana’s Manual of 1887. Species rec- 
ognized by Dana in black face type; varieties in italics.) 
ACIDIC DIVISION. 
SULPHUR GROUP. 
Molybdenite. In well-formed crystals, E. 38th street (S.C. 
H.B 
BL): 
Quite plentifully in excavations for Columbia College build- 
ings, Fourth avenue and 49th street. 
Sparingly at Madison avenue and 120th street. 
Molybdite (yellow oxide of molybdenum). E. 42d street and 
other localities (J. W. Deems). 
Tellurium (Graphic) ? Manhattanville (S.C.H.B.). 
CARBON GROUP. 
Graphite. In vein of calcite in boulder. Corlear’s Hook, 
1825 (Robinson’s Min.). In hexagonal crystals, in feldspar, 
“near the city,” 1825 (Rob.). 
BASIC DIVISION. 
COPPER. 
Chaleopyrite. Present with pyrite in dolomite beds of 
Morrisania and elsewhere, massive specimen, Fourth ave., near 
115th street. 
Incrustation on gneiss, 135th street, bet. Seventh and Eighth 
avenues, 
Brilliant scales in veins in dolomite, Harlem Canal. 
Bornite (Erubescite) (variegated copper pyrites). Fort 
George (Wm. Niven, 1888). 
Bournonite. Fourth avenue, 80th street (W. E. Hidden). 
Malachite. In thin incrustations or aggregations of scales 
in fissures of gneiss, in color a rich emerald green, 56th street, 
Sixth and Seventh avenues; 117th street, bet. Madison and 
Fourth avenues; Fifth avenue and 100th street ; 100th street 
and Lexington avenue; Fort George (Tenth avenue and 195th 
street). 
Azurite. Similar in character to the above and found at 
most of the same localities. 
