EXPLANATION OF PLATES. 



PL.flTB52. PAGE 



ZAPHRENTIS STRIGATUS, N. Sp. 176 



FIG. 1 — Lateral view showing the calix. 

 FIG. 2 — Calix view of another specimen. 



FIG. 3 — Lateral view with a portion of the cup broken away, exhib- 

 iting the lamellae and tabulae. 



ZAPHRENTIS INVAGINATUS, N. Sp. 176 



FIG. 4: — Lateral view exhibiting the calix. 



FIQ. . 5 — Lateral view of another specimen with a portion of the side 

 broken away, to show the calix and the invaginated tabulae. 



ZAPHRENTIS ALBACORNIS, N. Sp. 177 



F I Q. , 6 — Posterior view showing the calix. 



F I Q . 7 — Posterior view of another specimen showing the calix. 



ZAPHRENTIS COMPRESSA. Milne Edwards. 177 



FIGS. 8-9 — Lateral views of two different specimens. 

 FIGS. 10-11 — Calix views of two other examples. 



ZAPHRENTIS CASSEDAYI. Milne Edwards. 178 



FIGS . 12-13-11-15 — Lateral views of four different examples, some of 



them showing spines. 

 FIG. 16 — Posterior view of another specimen showing the fossette. 

 FIGS. 17-18 — Calix views of two different individuals. 



