APPENDIX II. 



Since the preceding paper was placed in the hands of the 

 printer, a few additional specimens of coleinanite have been 

 received, which have yielded the following - additional forms: 



q = 3 P (331) 



G = — 7 P (771) 



ft = 2 P 4 (412) 



Y = 3 Pf (321) 

 rv = 7 Pf (721) 



V = — P oo (101) 

 W= 3 P oo (301) 



q (3 P) was found on a small fragment, showing also faces of 

 s, v, and y, as a very small face on the edge s (oo P) : v (2 P). 

 The condition of the face was such that very poor reflections 

 were obtained. The angles obtained, however, approximate suf- 

 ficiently close to the calculated values for q = 3 P to leave no 

 doubt as to the nature of the form 



G ( — 7 P) was found on a short columnar fragment with n, t, 

 <y, b, g, c, a, h and v. Its face was so small, on the edge s : <7, 

 that reflections could be obtained only with the lens thrown in 

 front of the telescope. In this way nine readings were made, 

 varying between 286° 47' and 288 8'. Seven of these readings 

 lay between the extremes 287 12' and 287 45'. A mean of 

 them all gave 287 J 30'. With this reading, and very good ones 

 obtained from the other faces in the zone s, G, a, b, angles were 

 obtained which approximate fairly well to the calculated values 

 for G = — 7 P. 



ft ( 2 P 4) occurs on a small, brilliant, but very much deformed 

 crystal, with a, c, y, d, b, s, k, i, h, o, v, t, n, m, and o. k and o 

 are much more developed than represented on any of the figures 

 in the plates, while v is very small indeed, ft is in the zone v , o, h, 

 on the edge o : h as a very narrow face and gives very faint and 

 blurred, though single, reflections, p : h = 169° 49' circa (169 

 47' 22" calculated). 



