The Monoclinic Pyroxenes of New York State. 157 



University collection, from West Point. The exact location is 

 unknown. It very closely resembles that found with the ore 

 near the Weston mine in Essex County. 



Highlands, Putnam Co. — Pyroxene occurs associated with 

 amphibole and titanite at the pyrite mines on the east side of 

 Anthony's nose. The writer found one large decomposed crystal, 

 with prismatic faces and a lamellar structure caused by basal 

 parting. 



A large stout augite crystal, much decomposed and bearing the 

 label "Highlands of the Hudson," is in the Cornell University 

 collection. It has the common habit of Orange county crystals, 

 with the combination of forms a (100), & (010), 7?i (110), c (001) 

 and e (Oil), (PI. XI Y, Fig. 5). Attached to it are several smaller 

 ones with the planes s (111) and u (111). 



A fine black doubly terminated crystal of the form shown in 

 PL XY, Fig. 3, and labeled " Orange Co.," is in the Williams 

 College collection. 



Ilonroe Township, Orange Co. — It is unfortunate that the 

 term Monroe on many pyroxene labels indicates nothing more 

 definite than Monroe township, for there are several localities 

 within the township where pyroxene occurs, and when the term is 

 found on labels of specimens which were collected over five years 

 ago, it may also refer to localities within the townships of Tuxedo 

 and Woodbur3\ which were formerly included in Monroe town- 

 ship. In the present township the two localities which have 

 furnished most of the pyroxene specimens are the Oneil and the 

 Clove Iron mines, both southeast of Monroe village. 



The majority of the, pyroxene crystals which the writer has 

 seen from this township are large black or greenish black indi- 

 viduals, with dull roughened faces and more or less decomposed. 

 One of the best specimens is in the collection of Cornell Uni- 

 versity. It is a black doubly terminated crystal, about 1:|: in- 

 long, and I in. thick. The faces present are a (100), 6(010), 

 m (110), u (111), s (111), (221) and p (101) (PI. XIII, Fig. 2). 

 The faces in the prism zone have an almost submetallic lustre 

 and are striated with lines parallel to the base, which probably 

 represent parting planes. 



Another group of black crystals in the same collection shows 

 the forms a (100), b (010), m (110), c (001) and e (Oil). (PI. Ill, 

 Fig. 3). This combination is a very common one in Orange 



