324 PROCEEDINGS OF THE AMERICAN ACADEMY. 



at this point_and considering the forms of the fragment between 

 (113) and (513) we have: 



Referred to N4 this zone fragment is very incomplete and contains 

 the extra forms ^, y, and y. 



r- (17- 1-18 -4) = (13-4-5). This scalenohedron is figured by 

 Palache 93 on three crystals of different habit from the Lake Superior 

 region of Michigan. Although this form falls in a high normal series 

 its zonal relations are good, the pole lying at the intersection of several 

 well marked zones. The form is probable. 



A: (13-1-14-3) = (10-3-4). This scalenohedron was also recorded 

 by Palache 94 on crystals from Lake Superior. It is figured as a series 

 of very narrow planes. The form falls in normal series N5 and shows 

 better zonal relations than the previously discussed scalenohedron for 

 the same occurrence. The form is probable. 



9; (40-4-44-9) = (31-9-13). Like the two preceding forms, this 

 scalenohedron was recorded by Palache on crystals from Lake Superior. 

 It appears to be less probable than the two preceding forms. 



The zone fragment between (6281) = (5l3) and (1120) = (lOl) 

 contains the following recorded forms: 



93 Palache, C, Geol. Surv. Mich., 6, Fig. 3, 14 and 19 (1900). 



94 Palache, C, Geol. Surv. Mich., 6, Fig. 5 (1900). 



