41 In Idaho, the Dinwoody and Woodside formations and the Thaynes group and Timothy formation are of Lower Triassic age (J. P. Smith, 1932; Newell and Kummel, 1941; Kummel, 1943). The Wasatchites fauna is not known there, but beds of Wasatchites age may occur in the Thaynes group between the Meekoceras and Ttrolites limestones. Wasachites has not been reported from either California or Nevada. Possibly equivalent beds may lie in the upper part of the Candelaria formation of Nevada (Muller and Ferguson, 1939). Spath (1934) has described a species of Wasatchites from the Posi- donomya beds of Spitsbergen, but suggests that these beds may be a little younger than the Wasatchites beds of Utah. The same author has des- cribed a species of Wasatchites from the Anasibirites beds of the island of Timor in the Netherlands East Indies. In Spath’s (1934) system of chronology Wasatchites is of late Owenitan to Columbitan? (late Lower Triassic) age. The age and correlation of the Beyrichites-Gymnotoceras fauna, high in the Toad formation, have been discussed recently (McLearn, 1948). Correlation is with the late Anisian, probably Paraceratitan (Spath’s system of chronology), that is, early, but not the earliest, Middle Triassic fauna of the American Pacific coast, Arctic, Mediterranean, Indian, and other regions. Very little is known in Canada of this fauna, outside of northeastern British Columbia. A fauna containing Gymnotoceras, however, has been reported by Warren (1945) from the upper or Whitehorse member of the Spray River formation in the central Canadian Rockies. It is doubtful if any part of the Nicola group of southern British Columbia is of Middle Triassic age. Indeed, most, if not all, of the Triassic of central and western British Columbia is of Upper Triassic age. The Beyrichites-Gymnotoceras fauna resembles closely the early Middle Triassic Anisian fauna, containing Anolcites, Nevadites, Paraceratites, and other ammonoid genera, that occurs in the lower part of the Star Peak formation of the West Humboldt Range of Nevada. A collection from Forest Hill in the American Canyon, West Humboldt Range (J. P. Smith, 1914), contains species similar to species in the Canadian fauna. Longo- bardites nevadanus Hyatt and Smith and Longobardites intornatus McLearn occur in both faunas and, indeed, in a broad sense, the latter may be only a variety of the former. The Canadian specimens of Beyrichites cf. falciformis are close to B. falciformis Smith; specimens of Beyrichites aff. tenuis are very close to B. tenuis Smith; and Sphaera cf. whitney? recalls S. whitneyi Gabb. Paraceratites, common in the Nevadites fauna, is ex- tremely rare in the Canadian fauna, only one poor specimen being known. Epigymnites is unknown in the Canadian fauna. Anoleztes, Nevadites, and Protrachyceras, represented by so many species in Nevada, have not yet been found in Canada in beds correlated with the Anisian. The fauna of the Pit shale in Shasta county, California, with NV evadites, is a small one, and has nothing in common with the Canadian Beyrichites- Gymnotoceras fauna. It may, however, be of the same age, or nearly, and 60920—43