82 HOFFMANN'S LIST OF 



Shuniah) mines (at the last named, Professor Chapman observed, in a vug, a bunch 

 of crystals, many of which measured upwards of eighteen inches in length). Thunder 

 Bay, Lake Superior, province of Ontario. Good specimens of dog-tooth-spar are also 

 found at Teuy Cape (Hants Co.), Black Rock (King's Co.), Tartridge Island and Two 

 Islands (Cumberland Co.), etc., in the province of Nova Scotia. 



92. Dolomite — In the form of rock-masses, is of very common occurrence in Canada. 



Besides forming great beds among the Laureutian limestones, dolomites make up the 

 chief part of the so-called Calciferoiis formation, and are developed on a great scale in 

 its geological equivalent, the Quebec group. The so-called limestones of the whole 

 of the Middle and Upper Silurian series in Ontario are, with few exceptions, dolo- 

 mites, including the Clinton, Niagara, Cruelph, and Onondaga formations. See also 

 note to " Pearl-spar." 



93. DOMEYKITE — Has been found, in admixture with niccolite, in a vein cutting a bed of 



amygdaloid on Michipicoten Island, Lake Superior, province of Ontario. Analyses, 

 T. S. Hunt, Geol. Can., 1863, p. 506. 

 04. Elaeolite — Is mentioned, by Dr. Hunt, as occurring in orange-red grains, with black 

 hornblende, in a white felspathic rock, which is found in boulders on Pic Island in 

 Lake Superior, province of Ontario. 



95. Epidote— Characterizes large portions of the metamorphic rocks of the province of 

 Quebec, in many parts of which occur beds which are entirely made up of quartz 

 and epidote ; sometimes in distinct grains, at other times forming a homogeneous, 

 generally pale green, very tough and sonorous rock. Characteristic specimens of this 

 rock are met with in the township of Melbourne (Richmond Co.), but beds of the 

 same occur in numerous localities in this section of the province. This mineral has 

 been met with in the crystalline form, in a concretionary epidotic rock, at St. Joseph 

 (Beauce Co.), province of Quebec ; also in some of the amygdaloidal traps and green- 

 stones of Lake Superior — as at Mamaiuse, where crystals of the same are found 

 implanted upon mesolite — in the province of Ontario. 



96. -Epistilbite — Is found with stilbite on ledges of trap at Margaretville, about seven 



miles east of Port George, Annapolis county, province of Nova Scotia Analyses, H. 

 How, Am. Journ. Sci., 2 ser., vol. xxvi, p. 33, 1858. 



97. Epsomite — Occurs at the Clifton gypsum quarry, Windsor, Hants county, province of 



Nova Scotia. As an efflorescence on the black shales of the Utica formation near 

 Montreal (Hochelaga Co.), and upon the black shales of Quebec (Quebec Co.), pro- 

 vince of Quebec. As an efflorescence on a serpentine rock near the iron-ore bed of 

 Crow Lake in Marmora (Hastings Co.), and as a crystalline incrustation upon shel- 

 tered surfaces of the dolomites at various points along their outcrop from Niagara 

 Falls to Lake Huron, and near Niagara is said to be found, with gypsum, in géodes 

 in the rock — province of Ontario. Also occurs, in association with mirabilite, as an 

 incrustation upon the cliffs of shale at Fort St. John, Peace River, British Columbia. 

 Anal., a. G. Hoffmann, Rep. Geol. Can., 1875-76, p. 421. 



98. Erythrite — Is found as a rose-red incrustation on calcareous spar, at Prince's mine 



on Lake Superior, province of Ontario. 



99. Essonite — Occurs, in small crystals, with crystals of idocrase, pyroxene and zircon, 

 in calcite at Grenville (Argentenil Co.), and both massive and crystallized, in the 

 townships of Portland and Wakefield (Ottawa Co.), in the province of Quebec. 



