ORDER VI. PARATOMOUS KOUPHONE-SPAK. 229 



13*73 of soda, 22-55 alumina, 55-84 silica, and 7*90 water. 

 Upon charcoal it melts without intumescence or ebullition, 

 into a clear, a little vesicular, glassy globule, and gelati- 

 nises in muriatic acid. 



2. The hexahedral Kouphone-spar chiefly occurs in the 

 cavities of amygdaloidal rock, and several kinds of basalt ; 

 less frequently it is found in small irregular veins, and in 

 a few rare instances, in beds and veins belonging to more 

 ancient rocks. In the first of these they line the sides of 

 the cavities, or fill them up altogether. It is accompanied 

 by various other species of the present genus, particularly 

 the prismatic and pyramidal Kouphone-spars. In beds it 

 occurs along with dodecahedral Garnet, several species of 

 Augite-spar and Iron-ore, rhombohedral Lime-haloide, &c. ; 

 the latter species, and paratomous and prismatoidal Kouph- 

 one-spar, are found with it in metalliferous veins. 



3. Fine, and particularly large crystals of the present 

 species, are found at the Seiser Alp in the Tyrol, at Dumbar- 

 ton in Scotland, near Almas and Tokoro in Transylvania, 

 &c. Other varieties of it are found in several parts of Scot- 

 land, particularly in the Western isles ; also in the Faroe 

 islands and in Iceland ; near Catania, at Monte Somma, in 

 the Cyclopic islands, &c. It is met with in the ironstone 

 beds of Arendal in Norway, and in the silver veins of An- 

 dreasberg in the Hartz. 



4. PARATOMOUS KOUPHONE-SPAR. 



Pyramidal Zeolite or Cross-Stone. JAM. Syst Vol. I. p. 

 362. Pyramido-prismatic Zeolite or Cross-Stone. Man. 

 p. 143. Harmotome. PHILL. p. 56. Kreuzstein. 

 WERN. Hoffm. H. B. II. 1. S. 261. Harmotom. 

 HAUSM. II. S. 557. Harmotom. LEONH. S. 451.. 

 Harmotorae. HAUY. Traite', T. III. p. 191. Tabl. 

 comp. p. 52. Traite, 2de Ed. T. III. p. 142. 



Fundamental form. Scalene four-sided pyramid. 

 Vol. I. Fig. 9. 



