PLATE LXXXVII. 



DlSCORBINA. 



Figures 1, 4. — Discorbina rosacea, d'Orbigny, sp., 



Fig. 1. a, Superior aspect; 6, inferior aspect; c, peri- 

 pheral aspect, . . • . x 100 



Fig. 4. a, Superior aspect; h, inferior aspect; r, peri- 

 pheral aspect, . . • ■ <>l 



Diara. Page 



644 



60 652 



2. — Discorbina vesicularis, Lamarck, sp., • * 35 651 



a, Superior aspect; b, inferior aspect; c, peripheral 

 aspect. 



:5. — Discorbina rugosa, d'Orbigny, .sp., 



a, Superior aspect; 6, inferior aspect; c, peripheral 

 aspect. 



5-7. — Discorbina valvnlata, d'Orbigny, sp., . . • ,;44 



Fig. 5. a, Superior aspect; 6, inferior aspect; c, peri- 

 pheral aspect, 



x To 



Figs. 6, 7. Small adherent specimens, . . x 100 



8. — Discorbina turbo, d'Orbigny, sp., . 



a, Superior aspect; b, inferior aspect; e, peripheral 



aspect. 



60 642 



