A7 Pelecypods.

Pecten carlottensis Whiteaves. Avicula, sp. cf A. whiteavest Stanton. Cardium tumidulum Whiteaves. Ostrea ? sp.

Gastropods. Several genera, undetermined. Cephalopods.

Schloenbachia propinqua Whiteaves ? Arniotites ? sp.

Liparoceras ? sp.

Harpoceras ? sp.

On Frederick island are calcareous argillites very rich in the fossil Pseudomonotis subcircularis, Gabb. In Lepas bay the same species and a species of Halobia were found. E. M. Kindle says that these specimens are probably upper Triassic forms. It thus seems probable that the lower part of the Maude formation is of this age. Until the somewhat provincial fauna from the formation is carefully studied, its age cannot be de- finitely ascertained.

YAKOUN FORMATION.

Distribution. The Yakoun formation is well exposed on Skidegate inlet and at Yakoun lake, and takes its name from the latter locality. On Skidegate inlet the formation is found along the shore from a mile northeast of Skidegate Indian village to Haida point, underlying the eastern limb of the Cretaceous syncline. The formation is also well exposed at the eastern end of Maude island, at Alliford bay, at Steep point, along the shore west of Saltspring bay, in the western part of the inlet, and along Skidegate channel. Inland, the formations extend northward, in the highlands east of the Honna river, to the vicinity of Camp Wilson, being exposed on several streams, notably the head- waters of the Tlell river. Around Yakoun lake the formation

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