30 NEW YORK STATE MUSEUM 



21 Calcite from Union Springs, showing crystals of the pyramidal 

 type characteristic of the first generation. Forms: y (8.8.16.3), 

 r (ion), e (0112). 



22 Calcite from Union Springs, showing crystal of prismatic habit 

 marking one phase of the second generation. Forms: m (1010), 

 a (1120), y (8.8.16.3), n (3.16.19.2). 



23 Calcite from Union Springs, showing crystal of transitional 

 habit between pyramidal forms of the first generation [fig. 2 1] 

 and scalenohedral forms of the second [fig. 25]. Forms_:_w 

 1010), a (1120), y (8.8.16.3), r (ion), M (4041), X (81.41.122.- 

 40) ; the latter scalenohedron is new to the species. 



24 Calcite from Union Springs, showing crystal of scalenohedral 

 habit characteristic of the second generation, but with subsidi- 

 ary development of the predominating forms of figure_23. 

 Forms: m (ioio),y (8.8.16.3), r (ion), m (4041), X (81.41.122.- 

 40), v t (7.4.11.3). 



2 5 Calcite from Union Springs showing crystal of distinctly scaleno- 

 hedral habit. This combination is typical_of the second gener- 

 ation. Forms: m (1010), a (1120), M (4041), v / (7.4.11.3). 



26 Calcite from Union Springs showing milky white crystal of 

 second generation occurring with first generation crystals of 

 rhombohedral habit [fig. 28.] Forms: m (1010), y (8.8.16.3), 

 r (ion). M (4041), 77 (0441), X (81.41.122.40), U (10.4.14.3). 



