laron Clinton beds. At about 8 feet above the sandstone occurs the thin zone of 1/2 inch grit with many small Whitfieldellas. On this layer also occurs many byngra, A. majoralis etc. Parks thought that Helicorion does not occur in these lower 10 feet but they cer- tainly occur on the Whitfieldella slabs and they are common in the rest of the beds and are decidedly common in the rest of the section attaining a maximum in the red beds. My material is in part from the road side down the hill from the dam at Cataract and from the quarries just back on the hill of the railway station at Forks of Credit. The latter is less than 3 miles south of Cataract. Andplotheea planocorruea are by no means so common here as at Circus ground and come in at about 8 above the sandstone and occur at least from this zone up to about 15 feet above the sandstone. They seem to hold a restricted zone between 7 feet and probably even less,