1888. | NEW YORK ACADEMY OF SCIENCES. 225 
Crystals, also massive, Fort George (W. Niven). 
Small crystals, some doubly terminated mounted on pedestals 
of milky quartz, in dolomite beds, Harlem Canal. 
Rose, in granite on the Island (Rob.); inferior specimens. 
under Harlem R. R. track at 122d street (LL. D. Gale, 1838). 
Also found at Morrisania. 
Amethyst. Limpid quartz prisms with pyramidal caps of 
amethyst. similar to specimens from Transylvania ; some of the 
caps were ? inch in diameter and were removable, 59th street, 
Sixth and Seventh avenues. 
A few pale specimens obtained from a bed of quartz at 117th 
street near Fourth avenue. Possibly allied to the rose quartz of 
Dr. L. D. Gale at 122d street. 
Ferruginous. Found everywhere, especially abundant in the 
drift at Manhattanville. 
Striped Jasper, often called Agate. In large and small boul- 
ders deposited from the drift. 
Jasper, red, brown, green, and blue. Along Harlem river. 
Basanite or Touchstone. Drift of Harlem. 
Chert, a yellowish jasper-like rock from the drift. Gansevoort. 
street. 
Silicates. 
Anhydrous—Bisilicates. 
Wollastonite. Fort George. 
Pyroxene, Augite. Group of fine hexagonal crystals witl» 
shimmering surfaces, in color a dull leek green, 56th street,. 
Sixth and Seventh avenues. 
Large specimen in wall, probably a ‘‘ wandering stone,” 102d! 
street, Madison avenue. 
Malacolite (white augite). In good crystals often doubly 
terminated. At the beds of dolomite near Inwood and Thomp- 
son’s Quarry, 196th street. 
Pyrallolite, in dolomite, name substituted for rhoetizite (Nut- 
tall). Kingsbridge. 
Coccolite, along Bronx river (Rob.). 
Hypersthene. Observed occasionally in boulders. 
Amphibole, Hornblende. In rich black bladed masses, 56th 
street, Sixth and Seventh avenues. 
In crystallized masses, Fifth avenue, 100th street. 
Hornblende as a constituent of hornblendic gneiss and slate, 
abundant. It is often associated with epidote. 
