1. INTRODUCTION

2. KINEMATIC STRUCTURE OF THE TWO CLUSTERS
2.1. Kinematic Structure of the Two Clusters
2.2. Previous Work

3. NEW DATA

4. PASSIVE SPIRALS

5. THE STAR FORMATION HISTORIES OF E+S0 GALAXIES

7. PHYSICAL PROCESSES DRIVING THE TRANSFORMATION
7.1. The Cluster Outskirts
7.2. The Cluster Cores

8. DISCUSSION AND CONCLUSIONS