NO. 2240. NOTES ON MIMETITE, ETC.— WHERRY. 381 



EXPI^NATION OF PLATE 56. 



The figures are somewhat idealized diagrams of the crystals described. New 

 forms are marked with an asterisk * below. 



Fig. 1. — Mimetite, Tin tic District, Utah; Prismatic habit; a combination of c (0001), 

 a (lOlO), X (lOll), y (2021), z* (3031), and tt (4041). 

 2.— Mimetite, same locality; acicular habit; c (0001), a (lOlO), h (1120), h (2l50), 



X (1011), a* (3032), y (2021), s (1121), and m (2131). 

 3. — Thaumasite, West Paterson, New Jersey, showing all the forms observed; 

 c (0001), a* (1120), m (1010), e* (10l2), /* (2023), j> (lOll), and q* (3032). 

 4. — Wavellite, Hellertown, Pennsylvania; a combination of h (010), a (100), 

 i (430), m (110), n (340), and o (121). 



