42 



It ought, therefore, to be heavier, though one might not have 

 expected to find the discrepancy so great as it really is. 



As for the hexagonal crystallization of the original parisite 

 I have already pointed out that it may possibly be only ap- 

 parent and due to constant twinning parallel to the base. 



In other respects there is great agreement between the 

 two minerals, and judging only from the outward appearance 

 one could not consider the Narsarsuk mineral to be distinct 

 from parisite. As, moreover, experience proves the necessity of 

 great caution in announcing a substance as a new mineral 

 species , I desist for the present from claiming for the one 

 here described the position of a new mineral. It may be united 

 to the parisite, and the true explanation of the discrepancies 

 stated may depend on future investigation. 



The parisite is of fairly common occurrence on Narsar- 

 suk. At the locality No. 2 it has been found in the greatest 

 quantity. Small crystals are most common here , but also 

 larger individuals have been found in this place. The accom- 

 panying minerals here are neptunite, epididymite, ægirine, 

 microcline etc., all of which are older than the parisite. Of more 

 recent or of contemporaneous origin are albite, elpidite, fluo- 

 rite, cordylite and polylithionite. Also at the localities No. 12 

 and 13 parisite has been met with tolerably abundantly. At 

 the former locality the largest of the known crystals (see 

 page 31) w^as found. The best developed, medium-sized crystals 

 were found at the locality No. 17 associated with the same 

 minerals as at the locality No. 2 and, besides, with arfvedsonite, 

 rhodochrosite, and spodiophyllite. 



10. Cordylite (Barium -parisite). 



The name of this new mineral is derived from the Greek 

 word xnpàùXri^ a club; the reason is that its crystals often 

 have a club-like form. 



