1888. ] NEW YORK ACADEMY OF SCIENCES, 231 
as to lead to the proposed name, “ kyanite-schist” (D. 8, 
Martin). 
Green and bluish varieties, probably the richest deposit ever 
found in the city, at 101st street and Third and Lexington 
avenues, obtained during the year 1885. The kyanite vein is 
parallel to the stilbite and other veins running from north-east 
to south-west, their most productive point being at the Harlem 
tunnel. 
Between the blades of kyanite appeared a deep-hued smoky 
-quartz, also garnets and scapolite. 
Sparingly at Manhattan avenue and 103d street. 
Datolite. In trap boulders. Old record. 
Sphene. In small rhomboidal prisms with dihedral summits 
of a light dove-color (silico-caleareous oxide of titanium of Coz- 
zens), in limestone. Kingsbridge (I. C.). 
In light green crystals at the brown calcite locality at 105th 
street and Fifth avenue. 
Also at Lexington avenue and 100th street, and 96th street 
and Third avenue. 
Larger and finer crystals of the same color obtained (1887) at 
Fort George. 
A chocolate-colored variety has been noticed along the 
Harlem River. 
Staurolite. In terminated prisms, ‘‘three miles from the 
city, near the North River” (Rob.). Also at Fort George. 
Hydrous Silicates—General Section. 
Laumontite. Sparingly at Fifth avenue and 104th st. 
Apophyllite. In trap boulder, Manhattanville (S. C. H. B.). 
Allophane. In silvery-white incrustations on boulders 
(S. C. H. B., and the author). 
Zeolite Section. 
_Thomsonite. Reported to have been found with the natro- 
lite and laumontite at Fifth avenue and 105th street. 
Natrolite. In delicate snow-white globes of radiated acicular 
crystals, similar to specimens from Bergen Hill. 
Associated with chlorite, sphene and rutile at the brown calcite 
locality, Fifth avenue and 104th street, 
