is near 225 feet and may be 250 ft. The lower third of the Coeymans may (30 to 40') be called the Illionia zone, the middle the Grimidal zone (about 100 ft.) and the upper third the Ispidula zone (about 30 feet). Stomatopora occur throughout the Coey- mans but are most abundant in the ispidi- dula zone, less common in the Grimidal zone and rarest in the Illionia zone. Lepadocrinus as stems are very common in the middle zone but good specimens appear to occur only in the Stomatopora bed. In 1904 I noticed that the upper corner edge is probably all transitional zone between Coeymans & New Scotland. Some several Favosites (F. hilduburgensis), many other P. solatus, E. medialis, E. singularis (Orich. form), Orthothete orthotamnus, Vincinulus mutabilis,