Coral beds of crinoids also come from the zone Lyons occurs between the Deltatheroidata and Bryozoa beds but I could find no trace of the Aulocorimnus. But in places strivings diminish my risks. Both zones less than 2 ft thick It is the Bryozoa bed undoubtedly that furnishes many bryochifrons of the radiate order still followed by the Spirifys acuminatus zone. This zone could be more appropriately called the City for reticularis zone because these shells are far more abundant than I. acuminata. This zone is one solid bed of a whitish-chinoidal limestone and very granular due to coral comminuted and rolled organic fragments. Coral corals most abundant, generally Aulocorimnus and they appear to have been rolled and worn by the