. La Canadian field-naturaliste. . VOL. 59 Canadian Field-Naturalist il SUTTON WEST, CANADA, MAI-JUIN 1945 N° D'UNE OEDOVICIAN AUNULE^^J DU QUÉBEC '' - par G. Winston Sinclair Sh- George Williams College, Montréal ne Rouge est un village dans le comté de Portneuf, à environ 30 milles à l'ouest de la ville de Québec. Il est situé sur la rivière Jacques-Cartier, près du village et sur une certaine distance en aval a réduit son canal dans les calcaires de l'Ordovicien moyen. La présence de ces pierres calcaires a été noté par de faibles (1892, Geol. Surv. Can. Rept. V, partie I, p. 35) et Okulitch (1939, Amer. Journ. Sci. 237

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. The Canadian field-naturalist. . VOL. 59 he Canadian Field-Naturalist SUTTON WEST, CANADA MAY-JUNE, 1945 NO. AN OEDOVICIAN J^^AUNULE FROM QUEBEC '' - By G. Winston Sinclair Sh- George Williams College, Montreal DoNT Rouge is a village in Portneuf county, about 30 miles west of Quebec City. It is situated on the Jacques Cartier River, which near the village and for some distance down- stream has cut its channel in limestones of middle Ordovician age. The presence of these limestones has been noted by Low (1892, Geol. Surv. Can. Rept. V, part L, p. 35) and Okulitch (1939, Amer. Journ. Sci. 237, p. 91), but they have never been investigated in any detail. Shelves of limestone are exposed along the river just above the railway bridge at the village. A heavy bed of bluish limestone over two feet thick is seen at low water at the base of the section. Its fauna, so far as was seen, is similar to that of the succeeding beds. A- bove it are ten feet of thin-bedded limestones, which carry the fauna dealt with in this paper. About nine feet of heavier limestone, which is exposed in an inaccessible clifF, com- pletes the section at this point. Higher beds are exposed farther downstream. v The ten feet studied in detail is made up of very varied beds, ranging from subaphanitic to quite earthy limestones. Many beds show evidence of resorting of material, and of in- duration before further deposition. Crinoid bases adhere to the bedding planes; large "trails" are common; broken cephalopods are found into which smaller shells have drifted. All the beds are thin (less than six inches), and individual beds vary in thickness from V2 to 4 inches in a distance of only a few feet. Collecting conditions are not good. The beds are under water part of every year, and most of them are quite waterworn on the surfaces. Few of them yield fossils on breaking. The pov- erty of the material is reflected in the incom- plete identifications in the list. It is certain -Received for public

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