18 
This crystal is of prismatic habit, showing the unit prism m(110) as 
the predominating form. The diametrical prism a(010) is a mere trunca- 
tion. The base c(001) is very minute — on the other hand the unit pyra- 
mids are large forms. 
The following forms were identified: 
a(010), m(110), c(001), s(lll), x(331). (Goldschmidt’s letters.) 
TOURMALINE FROM RAGOT TOWNSHIP, RENFREW 
COUNTY, ONTARIO. 
The tourmaline crystals described below were collected by M. E. 
Wilson on lot 15, concession X, Bagot township, Renfrew county, Ontario, 
They occur in crystalline limestone at the immediate contact with a granite 
dyke. By dissolving the carbonate of lime in a weak acid solution the 
crystals were freed from their matrix. They were found to be for the 
most part prismatic in habit, black in colour, and somewhat brittle. They 
range in size from microscopic to individuals more than 1 centimetre long. 
Many crystals were measured on the two-circle goniometer and the follow- 
ing forms were identified : 
Large forms: (2241); P:(7181); p(H21); a (1010); b(1120). 
Small forms: c(0001); m'(4481); to(3140); t?(2130); (4150); *(21.7.28.4); *(9.5.14.1) 
To calculate the <p and p of the two new forms (21, 7, 28. 4) and (9.5.14.1) Goldschmidt’s 
accepted figures were used. 
Calculated 
Measured 
V 
P 
9 
P 
13° 54' 
62° 01' 
14° or 
61° 50' 
20 38 
74 45 
20 56 
74 46 
SCOLECITE FROM THETFORD MINES, MEGANTIC 
COUNTY, QUEBEC 
Although there are several Canadian localities rich in zeolites, up to 
date only three were known where scolecite was to be found. 1 Recently 
the writer collected the mineral at the Jacob asbestos pit within the city 
of Thetford Mines. At this place very fine crystals of scolecite occur 
filling fissures in a highly altered, fine-grained leucocratic rock which on 
microscopic examination shows microcline, albite, biotite, and their altera- 
tion products. The particular specimen under examination did not contain 
any quartz. The veinlets have a minimum width of 2 centimetres. They 
are filled with scolecite crystals which have grown outward from both sides 
of the fissures and are somewhat interlocked. Very minute acicular crystals 
of brownish red diopside orientated in all directions and attached to the 
wall of fissure, lie in the scolecite crystals. Thus the diopside was a well- 
crystallized species when scolecite crystals began to grow. 
iNova Scotia. Cumberland county, cape D’Or and Two Iaiaada. (N.S. last. Nat. Sci., vol. 5, p. 293.) 
Quebec. Megantie county, Black Lake (Geol. Bury., Canada, vol. v, pt. A, p. 88). 
Poiteviu and Graham: Geol. Surv., Canada, Mus. Bull. 27, p. 63. 
