Miscellaneous Localities of Minerals, 2$l 



4. Hornblende. 



Var. a. Crystallized in six-sided prisms with diedral sum- 

 raits — but few specimens found. (Greenwood.) 



b. Carinthin — not abundant. (Greenwood.) 



c. Granular — very handsome. (Between the two ponds.) 



5. Mica. Dark bottle green, and finely crystallized. The 

 crystals lie contiguous to each other in a vein a foot wide, 

 presenting a tessellated appearance. Between the sides and 

 «nds of the crystals there is generally a thin layer of prisma- 

 tic filaments easily removed by the nail. The surfaces thus 

 exhibited are sufficiently smooth for the reflective goniome- 

 ter. On removing the outer pellicle, a dendritic iridescence 

 of great be.iuty is usually exhibited. I have never seen so 

 perfect and beautiful crystals of mica from any other loca- 

 lity. The following forms occur: 



Var a. A doubly oblique rhombic prism from half an 

 inch to 4 or 6 inches in diameter, and from a third of au 

 inch to four inches high. This is the common form. 



b The same with the two acute angles replaced by tri- 

 angular planes parallel to each other and forming obtuse 

 angles with their bases respectively. The bases are thus 

 rendered hexagonal j but the crystal is not a hexaedral 

 prism. 



c Triangular pyramids — rare. 



d. Oblique four-sided prisms with rectangular bases — 

 rarest of all. (Greenwood.), 



6. Calcareous spar. Flesh coloured; containing small 

 white and green crystals of augite, and mica ; in man/ places 

 -^very handsome between the two ponds. 



7. Ceylanite ; in small octohedrons, sometimes macled — • 

 occasionally in rhomboids with bracite in carbonate of lime. 

 (Between the two ponds.) 



8. Sphene. 



Var. a. Dark brown, in crystals, laminated and granular 

 masses so disseminated in the white augite as to give it a p»r- 

 phyritic appearance. 



b. Light brown, occurs abundantly about 1| miles east of 

 the two ponds, on the road to West Point. It is disseminated 

 ill a beaui ful green sahlile, generally delicately laminated — 

 laminae sometimes so small and irregular that it appears gra- 

 nular. I have one specimen weighing about a pound — it is 

 made up of the granular and laminated, and contains also dis- 

 tinct crystals — oblique four-sided [>risms with the two obtuse 



