PLATE I. 



Fig. 1. Ocnlina varicosa Lesueiir, natural size; variety with less prominent calicles. 



Fig. la. Oculina varicosa Lesueur, natural size ; small branch with crowded calicles. 



Fig. 2. Oculina varicosa Lesueur, magnified, with one polyp fully, and several partly, expanded. 



Fig. 3. Oculina varicosa Lesueur, polyp expanded, magnified. 



Fig. 4. Oculina varicosa Lesueur, ]>olyp contracted. 



Fig. 5. Oculina iniplicata Ag. ms., natural size. North Carolina. 



Fig. 6. Oculina arbuscula Ag. ms., natural size. South Carolina. 



