fogga, Opaula strenus and Hyolithus americanus. At Russell's ledge the design is either higher or lower, and it is probably the latter. To me this evidence looks like a break between the Millton and the Colechester. Reith therefore now regards the Lower Cam- brian of northern Vermont as made up of Minton quartzite (300'+), Windsor marble (400'), Mal- et dol. (700-800), and Colchester formations (clay, sandstone and dol., 200-250). = 1700' in all. The upper Cambrian - Lariatogan is now made up of Minton dol (500'), Highgate limestone and slate (300'), Shell town marble (200-400') and Williston limestone (500) = 2000' more. The Beclmontton begins with the Laranter argilmarate (30') and Bengia slate (3000') = 3530' in all.