248 THE CANADIAN NATURALIST. [Yol. 



IX. 



five-eiuhths of an inch thick, while a third measured two and a 

 quarter inches by eight-tenths of an inch — giving- an average 

 width of over two and a half times that of the thickness. 



Tn the township of Templeton well crystallised pyroxene is 

 often found in veins unaccompanied by apatite, for which mineral, 

 however, it has frequently been mistaken. As affording a good 

 example of this, a vein occurring on th.e twenty-fourth lot of the 

 ninth range may be mentioned. Good crystals of more or less 

 glassy, subtranslucent green pyroxene are here imbedded in a 

 pale flesh coloured calcite. They vary in length from a couple 

 of inches downwards, and are often well terminated at both ends. 

 They are almost invariably flattened in the direction of the clino 

 diagonial, and show the following planes: co P. [ocPoo]. oo P 

 a: . Pec . P. 2 P.-P. oP., and sometimes [2 Px ]. The specific 

 gravity of a crystal was found to be 3*232. Scales of mica 

 sometimes coat the crystals, or are enclosed in them. 



On lot thirteen in the eighth range of Templeton a white to 

 greyish-white or greenish-white pyroxene occurs, small quantities 

 of which were at one time mined under the supposition that the 

 mineral was apatite. The crystals exhibit the same planes as 

 those just described, but are less frequently flattened in the 

 direction of the clinopinacoid. 



The enclosure of mica in pyroxene crystals, which has already 

 been alluded to, may frequently be observed, and in some in- 

 stances the scales or crystals of mica may be seen to be more or 

 less symmetrically arranged with reference to the planes of the 

 pyroxene. On the seventeenth lot of the ninth range of Temple- 

 ton large crystals were observed, showing a central portion of 

 dark green pyroxene surrounded by a zone of minute scales of 

 mica, while the outer portion of the crystal was pale green 

 pyroxene. Other inclusions also are common, and among them 

 calcite, apatite and orthoclase. Not infrequently also pyroxene 

 crystals ara rounded as if by the action of some solvent, but this 

 is much less common than in the case of apatite. Sometimes 

 they have been cracked or broken in two, and the spaces between 

 the pieces filled up with calcite, apatite, or some other mineral. 

 In one case, a crystal four inches in diameter was observed which 

 had been fractured and re-cemented with apatite. 



The most interesting peculiarity observed, however, is the 

 tendency which the pyroxene in some localities exhibits to be- 

 come altered into a kind of uralite. This name was long ago 



