The Monoclinic Pyroxenes of New York State. 179 



EXPLANATION OF THE PLATES. 



PLATE XIII. 



1. Augite, Monroe Township, Orange Co.— a (100), h (010), m (110), u (111), 

 s(lll), (221), i) (101). 



2. Tilly Foster, Putnam Co.— a (100), 6(010), m (110), /(310), o (221), 

 i)(101). 



3. Eussel, St. Lawrence Co. — l (010), m (110). 



4. Diopside, Russel, St. Lawrence Co. — a (100), 6 (010), c (001). 



5^ Monroe Township, Orange Co.— a (100), 5 (010), m (110), u (111), 

 s(lll), 0(221), 0(021). 



6. Augite, St. Lawrence Co.— 7?i( 110), &(010), m(111), A (331). 



7. Angite, Pitcairn, St. Lawrence Co.— a (100), & (010), m(llO), c (001), 

 tt(lll), s(lll), 0(221). 



8. Diopside, Pitcairn, St. Lawrence Co. — m (110), u (111), s(Tll). 



9. Diopside, DeKalb, St. Lawrence Co.— a (100), 6(010), m (110), e(OOl), 

 u (111;, V (221), ("221), A (331), ]3 (Toi). 



PLATE XIV. 



1. Leucaugite, Edenville, Orange Co.— a (100), 6 (010), m (110), e (001), 

 « (ill), s (111.) 



2. Augite, Eossie, St. Lawrence Co. — Shows hemihedral distribution of 

 planes. 



3. Leucaugite, Edenville, Orange Co.- -shows hemihedral distribution of 

 planes, and twinned lower half of crystal. 



4. Augite, Gouverneur, St. Lawrence Co.— a (100), 6 (010), m (110), u (111), 



s(ni). 



5. Augite, Highlands of Hudson, Orange Co.— a (100), 6(010), m(llO), 

 c(OOl), e(lOL) 



Q. Augite, Warwick, Orange Co.— a (110), 6 (010), m (110), c(OOl), '«(111), 

 s (111), 0(211) p (101.) 



7. Augite Warwick, Orange Co.— a (100), 6 (010), m (110), e (001. ) 



8. Augite, Cheever Mine, Pt. Henry, Essex Co.— a (100), 6(010), m(llO), 

 c(OOl), m(111), s(T11.) 



9. Diopside, Pt. Henry, Essex Co.— a (100), 6(010), m(llO), c(OOl), 

 e(011),ij(T01.) 



10. Diopside Pt._Henry, Essex Co.— a (100), 6(010), m(llO), c(OOl), 

 m(111), s(ril), i9(101.) 



11. Black augite, Hammondville, Essex Co.— rt(lOO), 6(010), m(llO), 

 c (001), s (111.) 



12. Tilly Foster, N. Y.— a(lOO), 6(010), m(llO), c(OOl), s (111. ) 



