:irked: Once again, Don...it looks like Plerogyra discus. As you already know, Phil narrowed it down to that possibility. Via AIM, I forwarded you picture after picture, link after link and description after description of several possible matches. For a definite identification, contact Eric Borneman via the Marine Depot Forums.
Excerpt: "Plerogyradiscus is almost impossible to tell from Nemenzophylliaturbida at a glance. However, the difference is apparent here, with polyps arising from individual skeletal elements. We found this coral intermixed with Nemenzophyllia in the same area."