1893. ] NEW YORK ACADEMY OF SCIENCES. 105 
a 
Fig. 4 is a drawing of a crystal ‘showing the largest number 
of forms i in combination. All of the forms shown on Fig. 3, with 
ae exception of —iP ® (102), occur and in addition (t) 
4 P® (102) and the rarer forms (0) 4 P & (103) and (w) —2 P 2 
(211). 
ar 
ae 
Fig. 5 is a combination, showing part of the forms shown in 
Fig. 4, with the addition of the clinodome (0), P & (010). 
