326 PROCEEDINGS OF THE AMERICAN ACADEMY. 



St: (17-9-26-2) = (15-2-TI). This scalenohedron was recorded 

 by Cesaro on two crystals from Rhisnes, Belgium. The measured 

 angles given by Cesaro agree well with theory and the form, which 

 falls in normal series N3 presents good zonal relations. It should be 

 ranked as probable. 



Zone 7 = Z 7 Scalenohedrons of the Zone (4041 : 0881] = 

 [311 : 335]. -4 1 - (Miller) = f. Symbol j' 



The most prominent zone intersection in this zone occurs at the pole 

 (3251) = (302). Splitting the zone at this point we have for the 

 recorded forms in the fragment between (311) and 302) : 



Referred to N3 this fragment of the zone is incomplete and contains 

 the extra form -Q. 



g)i (19-10-29-6) = (18-1 •IT). This scalenohedron was recorded 

 by Cesaro 95 on crystals from Rhisnes, Belgium. Cesaro points out 

 the proximity of this form to (16-8-24-5) which is present on the 

 same occurrence but contends that the measured angles and zonal 

 relations point to the given indices. The form falls in normal series 

 N4 and should be classed as fairly probable. 



In the fragment of the zone between (302) and (335) the following 

 forms have been recorded : 



95 Cesaro, G., loc. cit., Fig. 54. 



